Electrostatic potential energy:
Law of conservation of energy:
Wnc is the work done by non-conservative forces like friction.
We'll use conservation of momentum to determine the relationship in the velocities of the balls. Take bead C is moving in the positive direction and bead D is moving in the negative direction.
pi = pf
0 = mcvc - mdvd
mcvc = mdvd
(1.0g)vc = (1.7g)vd
vc = 1.7vd
Two 2.0-mm diameter beads, C and D, are 12 mm apart, measured between their centers. Bead C has mass 1.0 g and charge 2.5 nC. Bead D has mass 1.7 g and charge -1.0 nC. If the beads are released from rest, what is the speed vC at the instant the beads collide? What is the speed vD at the instant the beads collide?
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