Question
A small metal sphere of mass 1.5 g and charge q 1 = - 2.80 C is held stationary at the origin. A second small
A small metal sphere of mass 1.5 g and charge q1 = - 2.80 C is held stationary at the origin. A second small metal sphere of mass 1.0 g and charge q2 = 7.80 C is projected toward q1. When charge q2 is at x = 0.800 m, it is moving toward q1 with speed 22.0 m/s. Assume that the two spheres can be treated as point charges. You can ignore the force of gravity.
a) Find the electric potential at x = 0.800 m due to charge q1. b) Find the potential energy for the system of two charges when they are 0.800 m apart. c) Will the potential energy for the pair of charges increase or decrease as charge q2 moves closer to charge q1? Will the speed of charge q2 increase or decrease as it moves closer to charge q1? Justify your answer. d) Find the potential energy for the pair of charges when they are 0.160 m apart. e) Find the speed of charge q2 when the two charges are 0.160 m apart.
k = 8.99 109 N.m2 /C2
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