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A(n) 0.4 kg softball is pitched at a speed of 14 m/s. Thebatter hits it back dir

ID: 1682209 • Letter: A

Question

A(n) 0.4 kg softball is pitched at a speed of 14 m/s. Thebatter hits it back directly at the pitcher at a speed of 21 m/s.The bat acts on the ball for 0.02 seconds. What is the magnitude ofthe impulse imparted by the bat to the ball? Answer in units ofN*s. b) Whaat is the magnitude of the average force exerted by thebat on the ball? A(n) 0.4 kg softball is pitched at a speed of 14 m/s. Thebatter hits it back directly at the pitcher at a speed of 21 m/s.The bat acts on the ball for 0.02 seconds. What is the magnitude ofthe impulse imparted by the bat to the ball? Answer in units ofN*s. b) Whaat is the magnitude of the average force exerted by thebat on the ball?

Explanation / Answer

mass of soft ball m = 0.4 kg pitched speed u = 14 m / s velocity of the ball after hitting v =21 m / s time of impact t= 0.02 s Magnitude of the impulse imparted by the bat to the ball J = m( v + u )   Since u and v are opposite to eachother                J = 14 N s (b). Average force F = J / t                                 = 700 N
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