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What is the Speed?

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A 5.0-m-diameter merry-go-round is initially turning with a 4.5 seconds period.

What is the speed of a child on the rim?


 

Known variables:

diameter (d): 5.0 meters

period (T): 4.5 seconds

velocity (v)= circumference / period

Circumference (c) = π x d

π x 5.0= 15.707 m


v=c/T


v= 15.707 m /4.5 s

v= 3.5m/s

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