Monte works at the local grain elevator during the summer months. He uses the lift to hoist a 122.1-Newton sack of grain to a storage area 28.5 meters above the ground.

a. What is the potential energy of the sack when in the storage room? (Units= Joules)

b. How much work was done in lifting the sack to this height? (Unites= Joules)

c. If the sack were to fall back down to the elevator floor, how much kinetic energy would it have just prior to landing?(Joules)