Question

What is the mass of a rock lifted 2 meters off the ground that has 196 J of potential energy?

Answer 1

Answer:

10kg

Explanation:

Let PE=potential energy

PE=196J

g(gravitational force)=9.8m/s^2

h(change in height)=2m

m=?

PE=m*g*(change in h)

196=m*9.8*2

m=10kg