A 0.16kg pool ballSliding to the right at 8.0 m/s has an elastic head on collision with another 0.16 KG pool ball initially at rest. If the first ball stops after the collision, what is the velocity of the second pool ball after the collision?

explanation:

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two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.