2. As a ball falls freely (without friction) toward the ground, its total mechanical energy
a. decreases (B) increases (C) remains the same
3. Dawn Donme, whose mass is 72 kg is skiing down a 55 meter high frictionless hill.
a. Calculate Dawn's total mechanical energy.
Fill in the appropriate kinetic and potential energy values into the chart below. Be sure to show
work for each step off to the side.
b.
c.
$PE_{top}$
$KE_{top}$
d.
e.
$PE_{35m}$
$KE_{35m}$
h = 55 m
f.
g.
$PE_{bottom}$
$KE_{bottom}$
h. How fast is she traveling at 35 meters above level ground?
Answers in size order: 0, 0, 20, 22, 14,000, 25,000, 39,000, 39,000, 39,000