Answer:
h = 12.74
Step-by-step explanation:
Remark
The Potential energy formula is PE= m*g*h where m is the mass, g is the gravitational constant, and h is the height.
Givens
m = 2.0 kg
g = 9.81
h = ?
PE = 250 J
Solution
250 Joules = m * g * h Substitute values
250 Joules = 2.0 * 9.81 * h Combine
250 Joules = 19.62 * h Divide by 19.62
250/19.62 = 19.62 * h / 19.62
h = 12.74 m
That means that the rock has fallen 12.74 meters and uses 250 Joules to get there.