Answer:
B)mv/t
Explanation:
The gain in momentum of the ball is generated by the impulse by the force from the bat over the collision duration t
[tex] \Delta p = m\Delta v = F t[/tex]
where m is the mass of the ball, Δv = v is the gain speed (since the ball was at rest initially), F is the magnitude of the force from the bat, and t is the collision duration. We can solve for F in term of m, v and t
[tex]F = \frac{mv}{t}[/tex]
So B) is the correct answer
