A 0.140-kg baseball is thrown with a velocity of It is struck by ...

[B]

A 0.140-kg baseball is thrown with a velocity of It is struck by the bat exerting an average force of 5000 N, which results in a velocity of 37.0 m/s in the opposite direction from the original velocity. How long were the bat and ball in contact?
 
  A) 1.79  10-3 s
  B) 1.28  10-2 s
  C) 3.07  10-2 s
  D) 4.30  10-3 s

Question 2

You push your 2 kg physics book along a tabletop, pushing it with 10 newtons of force. The frictional force on it is 4 newtons. The book's acceleration is
 
  A) 2 m/s2. B) 5 m/s2. C) zero. D) 3 m/s2. E) 0.2 m/s2.

[Leostella20]

Answer to Question 1

A

Answer to Question 2

D

[B]

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