Question

What is the difference in PE
between a 2.00 kg mass 3.00 m
high, and a 4.00 kg mass 5.00 m
high?
(Unit = J)

Answer 1

Answer:

137.34 J

Explanation:

Info given:

mass1 = 2kg

height1 = 3m

mass2 = 4kg

height2 = 5m

g = 9.81m/s^2

PE = mgh

plug in info we have:

for first mass:

mgh = (2kg)(9.81m/s^2)(3m) = 58.86 J

for second mass:

mgh = (4kg)(9.81m/s^2)(5m) = 196.2 J

Difference: 196.2 J - 58.86 J = 137.34 J