A baseball of mass 0.2 kg is moving to the right at a speed of 45 mph. It is struck by a baseball bat after which it travels directly upward at 35 mph. The collision takes 0.5 ms.

(draw a diagram)

1. What is the impulse delivered to the baseball by the baseball bat? Hint1: Don't forget to covert! And remember that impulse is final momentum - initial momentum. Hint2: Write out the final and initial momenta using unit vector notation. In other words, find = and =, then =+. Same for . (Note: Dr. Chabot uses the letter for impulse, but our book uses ) A. =(4.0 +3.1 ) kg m/s E. =(3.0 +4.1 ) kg m/s B. =(4.0 +3.1 ) kg m/s F. =(3.0 +4.1 ) kg m/s C. =(4.0 3.1 ) kg m/s G. =(3.0 4.1 ) kg m/s D. =(4.0 3.1 ) kg m/s H. =(3.0 4.1 ) kg m/s

2. What is the average force the baseball bat exerts on the baseball during the collision? Hint: Don't forget to covert the miliseconds into seconds! A. =(8.0103 +6.2103 ) N E. =(6.2103 +8.0103 ) N B. =(8.0103 6.2103 ) N F. =(6.2103 8.0103 ) N C. =(8.0103 +6.2103 ) N G. =(6.2103 +8.0103 ) N D. =(8.0103 6.2103 ) N H. =(6.2103 8.0103 ) N

3.

9. For this problem, which was described in the BEFORE: preceding video, choose the correct answer: O- O A. Fave = -79.8 N 2 kg, 3m/s 4 kq initially at rest. B. Fave = 97.5 N Fave = (-79.81 + 56.1 j) N AFTER: FIND Average force 1. 99 my'S D. Fave = (-1441 + 120 j) N on the 2kg puck during this glancing collision, assuming " ) 350 they were in 4 kg O contact for 30 MS. 0.73 Mls