# Physics

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A child twirling a 0.0120kg ball on a string in a horizontal circle parallel to the floor. The radius of this circle is 0.358m. The ball traveling once around the circle is 2.08 seconds.
a)Determine the centripetal force acting on the ball.
b) If the speed is doubled, does centripetal force double? If not, by what factor does the centripetal force increase?

• Physics -

a) F = m a
a = V^2/R
Get V from the radius and the period (P)
V = 2 pi R/P

b) A is proportionql to V^2

• Physics -

1.08

• Physics -

1.08

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