02 poi Previous Answers SF56 P13 My Notes A 015 kg baseball

0/2 poi Previous Answers SF56, P.13 My Notes A 0.15 kg baseball is thrown with a speed of 20 m/s. It is hit straight back at the pitcher with a final speed of 29 m/s. Assume the initial motion of the baseball is in the positive direction. (a) What is the impulse delivered to the ball? 7.35 kg m/s (b) Find the average force exerted by the bat on the ball if the two are in contact for 2.0 x 10-3 s. 3675 x N 5. 111 points I Previous Answers SF5 6.P P.14. My Notes A 3.1 kg steel ball strikes a massive wall at 10 m/s at an angle of 60° with

Solution

I = delta P = P_f - P_i

= m (V_f - V_i)

= 0.15 (-29 - 20)

= -7.35 kg m/s [-ve means toward pitcher]

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I = F * delta T

F = -7.35 / 0.002 = -3675 N