Question

A cart is loaded with a brick and pulled at a constant speed along an inclined plane the the height of a seattop. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seattop?

Answer 1

Gravitational potential energy = mass (kg) x gravitational field strength (N/kg) x height (m)

Therefore, 

3 x 0.45 x 10 = 13.5J <- it's joules because it's energy