Is it true that when a boy is enjoying a ride on the merry-go-round, which is moving at a constant speed of $10 m / s$ , the boy has zero acceleration?

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True

False

answer is A.

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Detailed Solution

The above statement is False.
The body moves at a constant speed of

10 m / s

. Speed is a scalar quantity, and it has only magnitude. The boy is sitting on the merry-go-round (circular path). Although the speed of the boy is constant, the direction of the velocity of the boy changes at every moment of time. Velocity is a vector quantity and it has both magnitudes and direction. So the change in the velocity direction means the body is accelerated, as we know that the time rate of change in velocity is acceleration.
The correct statement would be, the boy will be in an accelerated motion.

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