as
A) elastic:potential energy
B) mechanical:kinetic energy
C) kinetic energy:sound energy
D) gravitational energy:mechanical
2.
2)
A pole vaulter, mass 65 kg, pushes off and attains a height of 7 meters.
What is the gravitational potential energy of the pole vaulter at the top of his arch?
A) 9.28 J
B) 455 J
C) 2400 J
D) 4459 J
