When a major league pitcher throws a fastball the 0.14kg baseball is accelerated at 98m/s^2. The baseball is in contact with the pitchers hand for 1.85 meters. How much work does a pitcher do when he throws a fastball

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.