Question

1. potential energy:gravitational

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

Answer 1

Question 1: D

Question 2:D

Step-by-step explanation:

Question 1: D

Question 2

mass=m=65kg

Acceleration due to gravity=g=9.8m/s^2

Height=h=7 meters

Potential energy=m x g x h

Potential energy=65 x 9.8 x 7

Potential energy=4459 joules