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a parent swings a 15.5 kg child in a circle of radius 0.911 m, making 10 revolutions in 21.4 s. what is the period of revolution?(unit=s) please i need help

Respuesta :

MathPhys

Answer:

2.14 s

Explanation:

The period is the time for 1 revolution.  If it takes 21.4 seconds to make 10 revolutions, then it takes 2.14 seconds to make 1 revolution.

You can show this with a proportion:

t / 1 rev = 21.4 s / 10 rev

t = 2.14 s

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