Question

At what height would the gravitational potential energy have a value of 73.7 joules for a 15 kilogram object? Note that acceleration due to gravity is 9.8 meters/second2.
A. 0.5 meters
B. 1.2 meters
C. 2.0 meters
D. 3.1 meters
E. 3.4 meters

Answer 1

PE = mgh
PE = potential energy (in joules)
m = mass of object (in kg)
g = acc. due to gravity (9.8ms^-2)
h = height (in m)

Answer 2

PE=mass*g*height
73.7=15*9.8*?
?=.501