a baseball (m=140 kg) traveling 32 m/s moves a fielders glove backwards 25cm when ball caught. average force?

Question

its the average force exerted by the ballon the glove.

Answer 1

The problem relies on the concept of work and energy.

The ball has some initial amount of Kinetic Energy as it flies through the air at 32 m/s with a mass of 140 kg (!, are you sure you mean kg and not g? otherwise that is a VERY massive baseball...63.6 pounds).
KE = 1/2 mv^2

When the ball hits the glove, the glove exerts a force on the ball to bring it to a stop (and thus dissipating all of its KE), doing work. The force the glove applies on the ball is exerted over a distance.
Work = Force * distance

Set the change in KE equal to the work done by the glove equal to the average force applied multiplied by the distance,
KE = 1/2mv^2 = F * d
You are given m, v, and d, simply solve for F.

F = 1/2 mv^2 / d