a baseball is hit with a bat. the direction of the ball is completely reversed and its speed is doubled. if the actual contact with the bat lasts what is the ratio of the acceleration to the original velocity?

ratio = 9.67

Explanation:

given,

initial velocity = v

final velocity  = - 2 v

change in velocity = v-(-2v)

                               = 3 v

assuming the time be t = 0.31 s

acceleration =

                     =

                     = 9.67 v

ratio =

ratio = 9.67

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newton's first law of motion