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19 September, 16:22

A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating?

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  1. 19 September, 17:51
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    No, since the merry-go-round's speed is constant, it's speed is not changing; hereby, acceleration is impossible; for, by definition, acceleration must involve some change in speed. Without a change in speed, an object cannot accelerate. Acceleration accounts for some change in speed over a certain amount of time, if the change of speed is zero, the acceleration must necessarily be zero.
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