#1 The mass of a penny is 2.50 g. What is the gravitational potential energy of the penny if it at
rest at the top of the Empire State Building which is 381 m high.
#2 A sky diver is about to jump out of a plane 2500 m high. She has a mass of 58 kg. What is
her gravitational potential energy? (Ignore all kinetic energy)
#3 A tired mom is picking up after her child and she bends down to pick up his Yoshi doll. The
plush doll has a mass of 0.45 kg. She lifts if from the floor to about her waist 1.0 m high. What is
the work done by the mom to pick up the doll?
#4 A 8.5 kg suit case is on the top of a shelf that is 2.4 m high. What is the work required by a
guy to place it on the bed 0.90 m high?
#5 A mechanic has a car on a lift. The 2050kg car goes up from the ground to a point 2.45 m
high. What is the work done by gravity to lift the car?
#6 A kid is on a sled sliding down a hill. The hill is 8.0 m high and slopes slowly downwards.
The kid and sled together have a mass of 51 kg. How much work does gravity do in bringing the
kid down?
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