Question

What is the gravitational potential energy of a book with a mass of 0.30 kg on a 1.0 m high desk?

Answer 1

3.0

Same explanation as the person above but the significant figures must be considered in physics.

Answer 2

given,
mass, m = .30kg
height, h = 1 m
gravitational acceleration, g = 9.8 m/s²

PE = mgh = .30kg*9.8m/s²*1m = 2.94 J