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A tennis ball has mass 0.055kg and is hit at a speed of 120km/h by the server. The opposing player hits the ball exactly back along the line of its trajectory giving the ball a new speed of 110km/h. If the contact time between the racquet and the ball is 0.015s what is the average force on the tennis ball imparted by the opposing player. 234N 843N 10.2N 36.7N 122N

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Pc m(vt u) I) 120Km/he 3233m] F o5S 30 55 33.33) o ols

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