Asked by Anonymous
a tennis ball has mass 0.045 kg and is hit at a speed of 120 km/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 115 km/h. if the contact time between the racquet and the ball is 0.02s what is the average force on the tennis ball imparted by the opposing player?
Answers
Answered by
Chanz
Ft = change mv = mvf-mvi
Be careful with your signs. If you call the initial serve positive the return must be in the negative direction.
Be careful with your signs. If you call the initial serve positive the return must be in the negative direction.
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