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  • A boy travelling in an open car moving on a labelled road with constant speed tosses a ball vertically up in the air and catches it back. Sketch the motion of the ball as observed by a boy standing on the footpath.

A boy travelling in an open car moving on a labelled road with constant speed tosses a ball vertically up in the air and catches it back. Sketch the motion of the ball as observed by a boy standing on the footpath. Give an explanation to support your diagram.

Answers (1)

Let v be the vertical velocity, and u be the horizontal velocity of the car.

In the case of the ball, as it has both horizontal and vertical components of velocity, it will have a parabolic path when a person standing on a footpath sees the trajectory.

When a boy sitting in the same car sees the ball, the path will vertically up and down. However, he will be able to catch up with the ball provided the car moves at a constant velocity.

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infoexpert24

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