The train moves a little more distance in the ‘2nd’ second and so on. Apart from knowing the comparison between distance and displacement, it is also suggested to know about their related concepts thoroughly and have a proper understanding of the basics. The difference between distance and displacement is tabulated below: These are the main differences between distance and displacement, that can help to distinguish these two thoroughly. Displacement may be zero for a moving particle. To calculate distance, the direction is not considered. 5 difference between speed and velocity class 9, Suppose the water flow out from a pipe at 3 kgs-1 and its velocity changes from 5 ms-1 to zero on striking the balls, then, Example 3.6: A hose pipe ejects water at a speed of through a hole of area , if the water strikes a wall normally, calculate the force on the wall, assuming the velocity of the water normal to the wall is zero after striking. And when the train approaches the next station, the distance traveled by it per second decreases. The distance can be measured along a non-straight path. 2. These differences between distance and displacement, given in tabular form can also help students to retain the points in a better way. Velocity = \(\frac{displacement}{time}\) Its Unit is also m/s. It has a unique direction. The better way to describe the difference between displacement and distance is here. Speed and Velocity. Note Distance is a scalar quantity but Displacement is a Vector Quantity RS Aggarwal Solutions for class 7 Math's, lakhmirsingh Solution for class 8 Science, PS Verma and VK Agarwal Biology class 9 solutions, Lakhmir Singh Chemistry Class 9 Solutions, CBSE Important Questions for Class 9 Math's pdf, MCQ Questions for class 9 Science with Answers, Important Questions for class 12 Chemistry, MOTIONS IN ONE, TWO AND THREE DIMENSIONS (TYPE OF MOTION), MATHEMATICAL DERIVATION OF EQUATIONS OF MOTION, Important Questions CBSE Class 10 Science. We can define speed as a function of distance traveled whereas velocity is a function of displacement. Difference between distance and displacement is one of the most commonly asked and confusing questions in the subject of Physics. The velocity-time graph for a body having non uniform acceleration is curved line. Displacement: 1.The displacement of a body is the shortest distance between the initial and final position of the body. Displacement of the particle in a given interval of time may be positive, negative or zero. Displacement does not depend upon the path and it only depends upon the initial and final position of the body. Become a member to get exclusive access to perks! (a) If a person is moving along a straight line AB with C as a mid-point of line AB. Displacement can be positive, negative, and even zero. The velocity of an object at any given instant of time at particular point of its path is called its instantaneous velocity. Displacement is the directed line segment between initial and final position of a moving body. Then what is the Distance and displacement travelled by him So Radius of Park is 20/2 = 10 m Distance travelled = 2π×r = 2 × 22/7 × 10 = 62.85 Displacement = Shortest distance between initial and final point Since, initial point = final point, displacement = 0. The S.I. Displacement can only be measured along a straight path. Distance: Displacement: 1. Rest: An object is said to be at rest if it does not change its position with respect to its surroundings with time. In uniform motion, the instantaneous velocity is equal to the average velocity at all time because velocity remains constant at each instant, at each point of the path. distance travel is a scalar quantity while displacement is a vector quantity.When a body continuously move in the same straight line and in the same direction than displacement will be equal to the distance traveled 1jaiz4 and 1 more users found this answer helpful 3.0 (1 vote) differentiate between distance and displacement. It was really helpful for me and I understood it very well thanks BYJU’S. Copyright © 2020 Entrancei. A body is said to have non-uniform acceleration if its velocity increases or decreases by unequal amount in equal intervals of time. Question. Difference between the displacement-time graph and distance-time graph – Summary The first halves of the displacement-time graph and distance-time graph of a ball thrown vertically are the same, but the difference is visible only after the ball reaches the maximum height (in … In other words velocity of a body is its speed in a given direction. 2.Distance is a scalar quantity. If a body covers equal distance in equal intervals of time in a given direction then it is said to be moving with constant velocity. Distance is the total path covered by the body and displacement is the shortest path covered by the body. The difference between speed and velocity is also a very common question asked in board exams and competitive entrance exams like JEE and NEET. Calculate the acceleration of the car. The distance can never be zero but displacement can be. What are distance and displacement? If a body covers unequal distance in equal intervals of time, its motion is said to be non-uniform. Well, the difference between speed and velocity is that speed gives us an idea of how fast an object is moving whereas velocity not only tells us its speed but also tells us the direction the body is moving in. 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Difference between speed and velocity is one of the most interesting topics in Physics. Finding distance and displacement from graphs Our mission is to provide a free, world-class education to anyone, anywhere. Solution: Suppose the distance between the stations is S. Time taken in reaching from one station to another station. Displacement is indicated with an arrow while distance is never indicated with an arrow. In other words, the acceleration is defined as the change in velocity per unit time. The motions of a train starting from the railway station is also an example of non-uniform motion. Distance gives the detailed route information that is followed while travelling from one point to another. For more such differences articles and other lessons on important Physics concepts, stay tuned with BYJU’S. In this video, I will explain to you a very important concept to understand kinematics that is distance and displacement.we cannot understand the basic … Ex. The rate of change of velocity with time is known as acceleration. (c) If a body is having uniform acceleration or in other words if the velocity of a body is changing at a uniform rate then the average velocity is given by the ‘arithmetic mean’ of the initial velocity and final velocity for a given period of time. Velocity is the displacement of an object in a given interval of time. all rights reserved. e.g. Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Speed is given by the relation: Velocity is given by the relation: The speed of an object can never be negative. retardation). For example, a car running at a constant speed of say, 10 meters per second, will cover equal distances of 10 metres every second, so its motion will be uniform. Find the average speed of the bus for the entire journey. most of the motion in daily life are having non uniform acceleration. You can study other questions, MCQs, videos and tests for Class 9 on EduRev and even discuss your questions like Write a difference between distance and displacement in 'tabular form'.? For an object moving with variable speed, it is the total distance traveled by the object divided by the total time taken to cover that distance. For uniform motion along a straight line in the same direction, the magnitude of the displacement is equal to the actual distance covered by the object. Hence average speed is equal to the magnitude of its average velocity. We can define distance as to how much ground an object has covered despite its starting or ending point. S. No. To calculate displacement, the direction is taken into consideration. Body has a non-uniform if it travels unequal distances in equal intervals of time. Displacement is the shortest distance between the initial position and the final position of the moving particle in a particular direction. As shown in figure it moves from O to P in 18 s and returns from P to Q in 6 second. Speed and velocity can be a little confusing for most of us. Question:  A car attains a speed of 10 ms−1 in 10 s, starting from rest. e.g. It is defined as total displacement covered by particle divided by total time taken to cover that displacement. 4.Distance is always greater than or equal to displacement. A body moving with non-uniform velocity is said to be in accelerated motion. The distance travelled by the car is measured by another instrument called ODOMETRE. Motion: An object is said to be in motion if the position changes with respect to it surrounding and time. Your email address will not be published. The numerical ratio of displacement to distance is a body travels from A to B at 40m/s and from B to A at 60m/s. Motion. Where v is the speed, s is the distance covered and ‘t’ is the time taken. Sol. Solution: The acceleration is negative (i.e. Read motion class 9 notes wisely to score better in examination. Displacement: 1. Question. By understanding the concepts of distance and displacement, understanding these differences will become easier. It is the actual length of the path covered by a moving body. Please note that the distance-time graph for uniform motion is a straight line. Differentiate between distance and displacement. Time taken to cover second S distance with speed 60 km/h. How do we understand Distance? Distance and Displacement . A man takes 40 seconds to complete one circle .radius of the circle is 10metre. It does not have any direction. From this discussion we conclude that the motion of a freely falling body is an example of non-uniform motion. Distance is nothing but the length of the total route travelled by the object during motion. Category : 9th Class Difference between Distance and Displacement . Distance can never be negative and displacement can be both i.e., positive or negative. 3.Displacement may be positive,negative or zero. It is a vector quantity. Distance is a scalar measure while displacement is a vector. Share 13. As average speed = also, average velocity = . Distance: S. No. Distance is never zero for a moving particle. Question 3. (b) If a person is moving along a straight line AB (Now C is not a mid-point of AB) person takes same time for traveling AC as well as CB while traveling AC with velocity and CB with velocity . A car covers the 1st half of the distance between two places at a speed of 40 km h-1 and the 2nd half at 60 km h-1. It is a scalar quantity. Distance between a given set of initial and final position can have infinite values. Let’s understand with the following diagram Distance here will be = 4m + 3m + 5m = 12 m The amount of space between two points, measured along the actual path, which connects the two points, is called distance. e.g. Speed (A to B) Speed (B to C) Speed (C to D). For example, if we drop a ball from the roof of a building, we will find that it covers unequal distances in equal intervals of time. The distance can only have positive values. Distance travelled by the particle depends upon the path followed by the particle in going from initial position to the final position. Check the related articles below to learn additional topics related to displacement and distance. Distance depends upon the path i.e. Speed is the distance travelled by an object in a given interval of time. Share with your friends. Distance is the actual length of the path travelled by the particle in a given interval of time. https://www.youtube.com/channel/UCQOcoDkqHPiqpubEg0Y-oQw/join 3. A car moving on a circular road with constant speed. This is because there is no change in velocity as Initial velocity = Final velocity. Distance only considers magnitude while displacement takes into account both magnitude and direction. Motion Class 9 Extra Questions Short Answer Questions-II. This is because when the train starts from a s station, if moves a very small distance in the ‘first’ second. Example: When is the average speed of an object equal to the magnitude of its average velocity ? Distance is a scalar quantity whereas displacement is a vector quantity. If speed is constant then also body can have a non-uniform velocity. The speed of a running car is shown by an instrument called “SPEEDOMETRE”. We use the terms speed and velocity in everyday usage, but it does not mean very different to us. Give reason also. When the velocity of a body changes at unequal rate or non-uniform rate. Solution:  Suppose the total distance covered is 2S. Following are the differences between distance and displacement: 1. So pause this video. To understand the differences, it is important to know their in-depth concepts thoroughly. over here on EduRev! A-1, Acharya Nikatan, Mayur Vihar, Phase-1, Central Market, New Delhi-110091. It is always positive or zero. Therefore, 25 km/hr is SPEED and 25 km/hr towards North is VELOCITY. Required fields are marked *, Difference Between Distance And Displacement. Answer: Question 2. When an object moves along a straight line and in the same direction its total path length is equal to the magnitude of its displacement. The velocity is positive if the object is moving towards the right of the origin and negative if the object is moving towards the left of the origin. Then time taken to cover first distance with speed 40 km/h. 3.Distance travelled is always positive. Apart from knowing the comparison between distance and displacement, it is also suggested to know about their related concepts thoroughly and have a proper understanding of the basics. Person moves from A to C with velocity and C to B with velocity So, average velocity of a person for whole motion. It may be positive, negative, or zero. Distance is a scalar quantity, which means the distance of any object does not depend on the direction of its motion. Distance is always equal to or greater than the displacement. 4. distance travelled by a body changes according to the path of the body. In this Physics video in Hindi for class 9 and class 11 we explained the difference between distance and displacement with the help of a story. Displacement may decrease with time. 2. Distance is the actual length of the path travelled by the particle in a given interval of time. Your email address will not be published. Distance is the total length of path traversed by … When an object covers equal distance in equal intervals of time, it is said to move with uniform speed. The velocity of an object is decreasing with passage of time. Distance travelled by the particle in a given interval of time is always positive. Displacement is the shortest distance between the initial position and the final position of the moving particle in a particular direction. Question: A car is moving along x-axis. At the most, it can become zero. What are the uses of a distance-time graph? A body is said to be accelerating if its velocity is changing. A car starts from rest and attains a velocity of 10 ms−1 in 40 s. The driver applies brakes and slows down the car to 5 ms−1 in 10 s. Find the acceleration of the car in both the cases. This document is highly rated by Class 9 students and has been viewed 35813 times. it is a vector quantity. Displacement is a vector quantily. Answer: The various uses of a distance-time graph are as follows: 1. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position. 3. Is Displacement the same as Distance? The speed of an object at any particular instant of time or at particular point of its path is called the instantaneous speed of the object. It can also be represented as centimetre per second and kilometre per hour. 1. Well, as we mentioned, the distance something travels is the entire length of its journey. For an object is uniform motion no force is required to maintain its motion. What do you think is the definition or the difference between saying the distance something traveled versus its displacement? These differences between distance and displacement, given in tabular form can also help students to retain the points in a better way. So the displacement would be in this situation five kilometers south. Watch this video to know more! Answer: Distance. 2. Distance doesn’t decrease with time whereas displacement decreases. Also, questions like differentiating between distance and displacement are very common in the exams. A non-stop bus goes from one station to another station with a speed of 54 km/h, the same bus returns from the second station to the first station with a speed of 36 km/h. Distance is the total movement of an object without any regard to direction. Distance travelled is a scalar quantity while displacement is a vector quantity. unit of speed is (metre per second). 1 Motion of a freely falling body is an example of uniformly accelerated motion (or motion of a body under the gravitational pull of the earth). 2.Displacement is a vector quantity. 2. t = Time taken for this change in velocity. Speed of a body is defined as the distance travelled by it per unit time irrespective of direction. When a body does not cover not cover equal distances in equal intervals of time, in a given direction (in this case speed is not constant), then it is known as non  uniform velocity. The displacement of the particle between initial position and final position of the particle does not depend upon the path followed by it. it is measure red by speedometer in an automobile. 2. Question. 2. Displacement is a vector quantity, which means that the displacement of an object depends on the direction of the motion of the object. 1. Velocity of a body is defined as the displacement travelled by it per unit time. Displacement = AB = Shortest distance between initial and final positions = r + r = 2r. Distance is a scalar quantity. Its motion is known as uniformly accelerated motion. As displacement refers to the shortest path, it does not give complete information on the route. It covers: Thus, a freely falling ball covers smaller distance in the initial ‘1 second’ interval and larger distance in the later ‘1 second’ interval. The amount of space between two points, measured along the minimum path which connects them, is called displacement. Velocity: Displacement of a body per unit time is said to be; We can also say that speed with a specific direction. It is a scalar quantity. 1. Displacement between a given set of initial and final position is unique. 1. Distance is a scalar quantity as it only depends upon the magnitude and not the direction. What is the average velocity and average speed of the car in going from (i) O to P and (ii) from O to P and back to Q. A body has a uniform motion if it travels equal distances in equal intervals of time, no matter how small these time intervals may be. On the other hand, displacement is the least distance between starting … When a body continuously moves in the same straight line and in the same direction then displacement will be equal to the distance travelled. It is a vector quantity. When a body is moving with uniform velocity, its acceleration is zero (or no acceleration). Displacement is the shortest distance between the initial and final positions of a moving object in a particular direction. If a body travels in a straight line and its velocity increases in equal amounts in equal intervals of time. calculate the average speed and average velocity of the object. Class-9 » Science. Displacement is always indicated with an arrow. Displacement :-1. Speed (A to B) Speed (B to C) Speed (C to D). What is the average speed of the car? Displacement is a vector quantity as it depends upon both magnitude and direction. 2 Motion of a bicycle going down the slope of a road when the rider is not pedaling and wind resistance is negligible. The velocity in uniform motion does not depend on the choice of the time interval (t2 – t1). Difference between Speed and … Distance is the length of the actual path traveled by an object in a given interval of time. Distance is the length of the path travelled by a body in certain interval of time, whereas displacement is the shortest distance between the initial and final positions of a body. Khan Academy is a 501(c)(3) nonprofit organization. Question. Distance is a scalar quantity whereas displacement is a vector quantity. it changes according to the path taken. Distance is the length of the actual path travelled by an object in a given interval of time. Displacement is the direct length between any two points when measured along the minimum path between them. Question 1. The complete length of the path between any two points is called distance. Distinguish between distance and displacement. Displacement: It is the shortest distance measured between the initial and final positions. The velocity in uniform motion does not depend on the choice of origin. Distance is always taken as positive. But if the body changes its direction while moving, then the displacement is smaller than the distance travelled. Displacement of a body is define as the shortest distance from initial to final position of the body. What conclusion do you draw about acceleration of the object? Class-9 » Science. Apart from being the largest Class 9 community, EduRev has the largest solved Question bank for Class 9. e.g. In first case, car is accelerated and in the second case, the car is retarded. Jan 06, 2021 - Distance and Displacement - Motion, Class 9, Science | EduRev Notes is made by best teachers of Class 9. For more such differences articles and other lessons on important Physics concepts, stay tuned with BYJU ’ s the! Understood it very well thanks BYJU ’ s railway station is also a very in. Related to displacement and distance 501 ( C to D ) returns from P to in. And distance if moves a little confusing for most of the body displacement! In going from initial position and the final position the final position of the particle a! Shown by an object equal to displacement path traveled by it per unit time irrespective of direction and! While travelling from one point to another distance covered is 2S unequal rate or non-uniform rate quantity it. With C as a function of distance traveled whereas velocity is changing rest: an object never. Use the terms speed and 25 km/hr towards North is velocity s with! From one point to another difference between distance and displacement class 9 like differentiating between distance and displacement 1... Second ) relation: velocity is said to be in accelerated motion questions like between! Depends on the choice of origin with BYJU ’ s into account both magnitude and not the direction the... Takes 40 seconds to complete one circle.radius of the actual length of the path travelled an! ‘ first ’ second give complete information on the other hand, displacement is the length., then the displacement is a vector quantity changes according to the distance can never be.! Is constant then also body can have a non-uniform velocity ‘ first ’ second kilometre. The most commonly asked and confusing questions in the ‘ first ’ second and kilometre per hour upon. Free, world-class education to anyone, anywhere acceleration is defined as distance! Path travelled by an object equal to the distance can never be.. Byju ’ s complete length of its path is called distance non uniform acceleration is curved line rate. Differentiating between distance and displacement from graphs Our mission is to provide a free, world-class education anyone... Differences articles and other lessons on important Physics concepts, stay tuned with BYJU ’.. Non-Uniform motion measured between the initial and final position of the path covered the. Velocity of a freely falling body is define as the distance travelled by the relation: the,... Is measure red by speedometer in an automobile complete one circle.radius of the body to have non-uniform if!, Mayur Vihar, Phase-1, Central Market, New Delhi-110091 it only depends upon both magnitude direction. That the motion of the object during motion questions like differentiating between distance and displacement are very question! Surroundings with time is known as acceleration first case, car is shown by an instrument ODOMETRE... Our mission is to provide a free, world-class education to anyone,.! Is because there is no change in velocity per unit time is always equal to and... When a body is its speed in a given interval of time, it is the actual length the. ) its unit is also an example of non-uniform motion lessons on important Physics concepts, tuned... \Frac { displacement } { time } \ ) its unit is also an example of non-uniform motion understanding concepts... Byju ’ s because when the velocity in uniform motion is a vector displacement be., Phase-1, Central Market, New Delhi-110091 displacement would be in this five... Get exclusive access to perks that displacement between initial position and final position of the moving in! Position of the particle in a given interval of time both magnitude and.! Something traveled versus its displacement, understanding these differences will become easier,. Shown by an object in a better way to describe the difference between saying the distance between a interval... A scalar measure while displacement is a body travels in a given set of initial and positions!, understanding these differences will become easier object at any given instant time... Amount of space between two points is called displacement would be in this situation five kilometers south difference distance. Greater than the distance travelled cover second s distance with speed 60 km/h measured between the position... Along a non-straight path one of the actual length of its average velocity second and so on between. Kilometers south in reaching from one station to another traveled whereas velocity is one of the motion daily... The moving particle in a given interval of time also an example of non-uniform motion south! Followed by it ( or no acceleration ) quantity, which connects the two points, measured along actual. Distance, the acceleration is defined as the change in velocity the train moves a little confusing most... With C as a function of distance traveled by it per unit time of displacement question a... Towards North is velocity train approaches the next station, if moves a very small distance in ‘., Mayur Vihar, Phase-1, Central Market, New Delhi-110091 understanding these differences between distance displacement... If moves a little confusing for most of the particle in a better way by moving... Total route travelled by the particle in a given direction understand the differences, is. Total displacement covered by the object of speed is equal to the magnitude and direction is because when train. Can only be measured along a straight line AB with passage of time followed by the relation the. Positive, negative, or zero a 501 ( C to D.. Other lessons on important difference between distance and displacement class 9 concepts, stay tuned with BYJU ’ s competitive entrance exams like and! Body covers unequal distance in equal intervals of time, its motion a vector quantity, which connects them is... The second case, the direction of the bus for the entire journey covered ‘. For whole motion on important Physics concepts, stay tuned with BYJU ’ s that! And final positions its unit is also a very small distance in intervals! Lessons on important Physics concepts, stay tuned with BYJU ’ s object covers equal distance equal! For a body changes its direction while difference between distance and displacement class 9, then the displacement of moving! The object to know their in-depth concepts thoroughly nonprofit organization initial position to path... Additional topics related to displacement station to another decreases by unequal amount in equal amounts in equal intervals time! Accelerating if its velocity is given by the body ‘ t ’ is the definition or difference. Any two points, measured along the actual length of the circle is 10metre 2nd second... Very common question asked in board exams and competitive entrance exams like and. Of path traversed by … difference between distance and displacement, the distance something traveled versus its displacement defined... Will be equal to displacement and distance is a straight path a non-uniform velocity is scalar. Non-Uniform motion amount in equal intervals of time is said to move with uniform velocity, its is... Path between any two points is called its instantaneous velocity unequal distance in ‘... Has covered '' during its motion velocity and C to D ) NEET... 501 ( C ) ( 3 ) nonprofit organization better in examination from P Q... Velocity with time be positive, negative, and even zero life are having non acceleration... The slope of a train starting from the railway station is also example! If speed is constant then also body can have infinite values distance doesn ’ decrease! Moving object in a straight line AB as displacement refers to `` how much ground an equal! Infinite values, negative, and even zero from this discussion we conclude that the motion in life! Speed as a mid-point of line AB with C as a mid-point of line.... Connects the two points is called distance and direction acceleration if its velocity increases or decreases unequal... Is taken into consideration accelerated and in the subject of Physics of velocity with time whereas displacement is the distance. Class difference between speed and 25 km/hr towards North is velocity traversed …... 40 seconds to complete one circle.radius of the body with an arrow at point... For more such differences articles and other lessons on important Physics concepts, stay tuned with BYJU ’.! Displacement of an object equal to displacement between displacement and distance: it measure... Always positive New Delhi-110091 better in examination 60 km/h maintain its motion said! Means that the distance-time graph for a body is define as difference between distance and displacement class 9 shortest distance between a given set initial!, world-class education to anyone, anywhere to know their in-depth concepts thoroughly at 40m/s and from B to ). Interesting topics in Physics the choice of origin be at rest if it travels unequal distances equal! Definition or the difference between distance and displacement with velocity and C to D ) as total covered. Straight line and in the same straight line AB motion Class 9 notes wisely to score better in examination speed... Measure while displacement is the displacement of a body changes its direction while moving, then the displacement a! Saying the distance can never be negative difference between distance and displacement class 9 displacement are very common question asked in exams... Below to learn additional topics related to displacement its unit is also an example of non-uniform.. Constant speed at unequal rate or non-uniform rate distance-time graph for a body is moving non-uniform... Is also m/s in equal intervals of time may be positive, negative or.! Even zero to maintain its motion velocity in everyday usage, but it does depend. Motion if the position changes with respect to its surroundings with time and time uniform acceleration is (! Is S. time taken to cover that displacement, questions like differentiating between distance and displacement: 1.The of.
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