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Balls are attached to the ends of two strings, each of length 0.400 m. Each ball...

Balls are attached to the ends of two strings, each of length 0.400 m. Each ball is given a charge of - 3.00 micro-coulombs, and the strings swing upward so that in equilibrium they are separated by an angle of =40.0 . Determine the mass of each ball.

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Answer #1

Let mass of left ball is m1 and of right ball is m2 as shown in the figure below,

The distance between balls is,

  

To calculate the mass of ball 1, equate vertical and horizontal forces on ball 1.

Similarily mass of right ball is,

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