Posted by Mike on .
A 0.140 kg baseball traveling 39.0 m/s strikes the catchers mitt, which, in bringing the ball to rest, recoils backward 13 cm. What is the average force applied by the ball on the glove?

Physics 
Elena,
Physics  drwls, Monday, June 11, 2012 at 1:24pm
Use this formula:
Force x distance = work done against mitt = Kinetic Energy change
Which leads to:
Force = (1/2)M V^2/d
If you want to start from F = m*a, you have to use an equation for the acceleration, a
a = V/t = v/[d/(v/2)] = v^2/(2d)
F = m*V^2/(2d)