Question

A free pitch ball A of 8g carries positive charge of +5×10C,what must be nature and magnitude of charge that should be given to second pitch ball B fixed 5cm below former ball so that upper ball is stationary?given:g=10m/s2​

Answer 1

Answer:

To keep the first pith ball stationary, the net force acting on it should cancel out to be zero.The force of gravity acting downward = Mg = 8 × 101000