One pith ball is
Two pith balls shown in the diagram below have a mass of 1.0 g each and have equal charges. One pith ball is
suspended by an insulating thread. The other charge is brought to within 3.0 cm. of the suspended ball (r = 0.03 m). The suspended pith ball is deflected from its rest position until the thread forms an angle of 30˚ with the vertical. At this angle, the ball is in equilibrium.
a) Draw a force diagram depicting the forces acting on the suspended ball.
Calculate (b) mg (c) FE (d) the charge on the pith balls