# physic

Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. each is attached to an identical string and suspended from the same point, as shown in Fiq.2. They repel each other and hang with separation 50.0 cm. The length of the string from the point of support to the center of a ball is 250 cm. Determine the charge on each ball.

Fiqure 2

is trinagle with equal sides 2.5 m and base is 0.5m

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1. F = k q^2/(.5)^2 = m g sin theta
where theta is angle from vertical
tan theta = theta in radians = sin theta for small angle = .25 m (half of distance between)/2.5 = 0.1

so
q^2 = .5^2 (.3)(9.81)(0.1)/(9*10^9)

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posted by Damon

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