Question

5. A cue ball traveling at 0.60 m/s hits the stationary 8-ball, which moves off with a speed of 0.20 m/s at an angle of 31° relative to the cue ball's initial direction. Assuming that the balls have equal masses and the collision is inelastic, what will be the speed of the cue ball?

Step 1

According to momentum conservation, the initial momentum is equal to the final momentum. Thus, the momentum conservation in horizontal direction is given by,

Step 2

Thus the final horizontal speed of the cue ball is,

Step 3

Thus, the momentum conservation in ve...

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