1. A 0.05 kg tennis ball approaches a racket at 25 m/s. If it is not in contact with the racket’s strings for 0.005 s, then rebounds at 25 m/s, what is the average contact force between the ball and the racket? Ignore air resistance.
2. A 5.0 kg crate initially at rest on a smooth surface is acted upon by two opposing forces: 50 N to the right and 30 N to the left. Find the acceleration of the block and the distance it moves in 10 s.
show solution please. thank you.
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what is the sum I guess it
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