University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 2 - Motion Along a Straight Line - Problems - Discussion Questions - Page 57: Q2.6

Answer

As for speed direction is not needed even if we move in some particular direction. But velocity require some particular direction. As magnitude of velocity gives the speed. So in some particular direction magnitude of velocity and speed are same. Velocity and speed can never be same at all.

Work Step by Step

Distance: The length of the path traced by a body irrespective of direction is called distance. Displacement: Distance covered y a body in a specified direction is called displacement. Average Speed: The ratio of total distance to the total time taken by a body i called average speed. Average Velocity: The ratio of total displacement to the total time taken by a body is called average speed. When a body moves in a particular direction, speed and velocity are equal. So, the average speed and average velocity will be equal when a body moves in a particular direction.
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