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During a pool game, a 180g cue ball strikes a stationary solid ball. This interaction lasts...

During a pool game, a 180g cue ball strikes a stationary solid ball. This interaction lasts 2 ms and results in an average force of 10N that recoils the cue ball with a speed of 5 m/s. Assume the force is directed along the negative x-axis and the ball is inititally moving in the positive x-axis. What is the initial speed of the cue ball?


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