?

AP® Physics 1 & 2

Free Version

Upgrade subject to access all content

Moderate

Falling off the Garage

APPH12-GVYJCK

Mark climbs up onto the roof of his house to hang a new floodlight above the garage. Being afraid of heights, Mark carefully looks over the edge and ponders a possible fall to the ground below ($y = 5\text{ m}$). Due to his nervousness Mark bumps the floodlight and it falls to the ground, shattering on impact.

Assuming no initial vertical velocity, by what factor did the total energy of the floodlight ($m = 6\text{ kg}$) change from the top of the fall to just before striking the ground?

A

$0$

B

$1$

C

$294$

D

$147$