1.

A ball of mass 100 g is moving with a velocity of 10 m/s and hits a bat and rebounds with a velocity of 10 m/s. The force of the blow by the bat acts for 0.01 s. The average force exerted on the ball b the bat is

A.  50 N                     
B.  100 N
C.  200 N                   
D.  zero
Answer» D.  zero


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