How to calculate force.

(0.17 kg)(53.9 m/s)-(0.17 kg)(24.5 m/s)/(1.83 s)

F= mVf - mVi / t

= 6.89 N

Mass- Softball (0.17 kg)

Initial Velocity- Speed of the pitch (24.5 m/s)

Final Velocity- Speed of the ball after hit. (53.9 m/s)

This is the force of the bat-ball collision