Ball Is Called In A Straight Line With A Speed Of 5 Ms–1 towards A Bigger BallB lying 20 M Away. After Collision With Ball B, Full A retraces The Path And Reaches Its Starting Point With A Speed Of 4 Ms–1. What Is The Average Velocity Of Ball A during The Time Interval 0 To 6 S?

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Question

Ball is called in a straight line with a speed of 5 ms–1 towards a bigger ballB lying 20 m away. After collision with ball B, full A retraces the path and reaches its starting point with a speed of 4 ms–1. What is the average velocity of ball A during the time interval 0 to 6 s?

Solution

Correct option is

2 ms–1

 

The time taken by ball A to reach ball . During the time interval 0 to 6 s, ball A covers a distance of 20 m upto ball B (which takes 4 s) and in the next 2 s, it covers a distance of

 in the opposite direction. 

 Net displacement = 20 m – 08 m 

                                 = 12 m 

                                 = 2 ms–1.

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