*GUYSS THIS IS REALLY SIMPLE*

7. a big rock was dropped from the third floor of a building. what happens to the kinetic energy of the ball as it falls?

a. the rock's kinetic energy increases
b. the rocks kinetic energy decreases
c. the rock's kinetic energy remains the same
d. the rock's kinetic energy cannot be identified

8. a 2kg is elevated up a building, how much is its potential energy 10m from the ground?

a. 5J b. 20J c. 98J d. 196J

9. a heavy metallic ball was rolled up on a frictionless ramp. what happens to the gravitational potential energy of the ball as it rolls up the ramp?

a. the ball's gravitational potential energy increases
b. the ball's gravitational potential energy decreases
c. the ball's gravitational potential energy remains the same
d. the ball's gravitational potential energy cannot be identified​