What is the force which she must apply to the baseball if her mitt recoils a horizontal distance of 25.1 cm?

514 n-this is an example of work being done by a non-conservative force (the applied force of the mitt) upon a baseball in order to change its kinetic energy. so wnc = change in ke the change in kinetic energy can be computed by subtracting the initial value (0.5 m vi2) from the final value (0 j) . change in ke = kef - kei = 0 j - 0.5 (0.163 kg) (39.8 m/s)2 = -129 j the force can be determined by setting this value equal to the work and using the expression for work into the equation: wnc = -129 j f d cos(theta) = -129 j f (0.251 m) cos(180 deg) = -129 j f = 514 n