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A parent swings a 11.5 kg
child in a circle of radius
0.711 m, making 12 revolutions
in 27.4 s. How much force does
the parent exert on the child?
(Unit = N)

Respuesta :

MathPhys

Answer:

22.5 N

Explanation:

Taking towards the center to be +x, sum of forces on the child in the x direction:

∑F = ma

F = m v² / r

F = m (ωr)² / r

F = m ω² r

Plugging in values:

F = (11.5 kg) (12 rev × 2π rad/rev / 27.4 s) (0.711 m)

F = 22.5 N

Answer:

the answer is 62.1

Explanation: