calculate the average speed and average velocity of the object. Speed of a body is defined as the distance travelled by it per unit time irrespective of direction. it changes according to the path taken. Motion: An object is said to be in motion if the position changes with respect to it surrounding and time. The motions of a train starting from the railway station is also an example of non-uniform motion. 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. Distance is the actual length of the path travelled by the particle in a given interval of time. Its motion is known as uniformly accelerated motion. 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 … 4. distance travelled by a body changes according to the path of the body. Is Displacement the same as Distance? Answer: Question 2. Share with your friends. Then time taken to cover first distance with speed 40 km/h. If a body covers unequal distance in equal intervals of time, its motion is said to be non-uniform. By understanding the concepts of distance and displacement, understanding these differences will become easier. Share 13. Displacement is the directed line segment between initial and final position of a moving body. 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. 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. What are distance and displacement? When an object covers equal distance in equal intervals of time, it is said to move with uniform speed. Finding distance and displacement from graphs Our mission is to provide a free, world-class education to anyone, anywhere. 2. t = Time taken for this change in velocity. Therefore, 25 km/hr is SPEED and 25 km/hr towards North is VELOCITY. Become a member to get exclusive access to perks! The distance can never be zero but displacement can be. Following are the differences between distance and displacement: 1. Answer: Distance. 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. Note Distance is a scalar quantity but Displacement is a Vector Quantity Question 1. It is a scalar quantity. In other words velocity of a body is its speed in a given direction. These differences between distance and displacement, given in tabular form can also help students to retain the points in a better way. Question: A car attains a speed of 10 ms−1 in 10 s, starting from rest. What do you think is the definition or the difference between saying the distance something traveled versus its displacement? Khan Academy is a 501(c)(3) nonprofit organization. 2 Motion of a bicycle going down the slope of a road when the rider is not pedaling and wind resistance is negligible. 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. Distance is never zero for a moving particle. Calculate the acceleration of the car. e.g. 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. Let’s understand with the following diagram Distance here will be = 4m + 3m + 5m = 12 m To calculate distance, the direction is not considered. Distance: S. No. Distance and Displacement . Speed is given by the relation: Velocity is given by the relation: The speed of an object can never be negative. Distance is always taken as positive. What are the uses of a distance-time graph? e.g. Watch this video to know more! 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. When a body is moving with uniform velocity, its acceleration is zero (or no acceleration). 1. Distance is the actual length of the path travelled by the particle in a given interval of time. The displacement of the particle between initial position and final position of the particle does not depend upon the path followed by it. Hence average speed is equal to the magnitude of its average velocity. Distance is nothing but the length of the total route travelled by the object during motion. 2. Question. Distance travelled by the particle in a given interval of time is always positive. The speed of a running car is shown by an instrument called “SPEEDOMETRE”. most of the motion in daily life are having non uniform acceleration. 1. (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. It is a vector quantity. Class-9 » Science. Copyright © 2020 Entrancei. Displacement is a vector quantity as it depends upon both magnitude and direction. Magnitude of its journey total path covered by a moving object in a given interval of.... Uses of a moving body covered by a body changes at unequal rate non-uniform. As average speed and velocity can be positive, negative or zero is defined as the change in velocity initial! Is 2S between a given set of initial and final position of the body is decreasing passage. Required fields are marked *, difference between distance and displacement is average. Displacement from graphs Our mission is to provide a free, world-class education to,! 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