Which object has the most gravitational potential energy?
6 kg6\text{ kg}6 kg box on a shelf 2 m2\text{ m}2 m above the ground
3 kg3\text{ kg}3 kg box on a shelf 2 m2\text{ m}2 m above the ground
6 kg6\text{ kg}6 kg box on a shelf 4 m4\text{ m}4 m above the ground
3 kg3\text{ kg}3 kg box on a shelf 4 m4\text{ m}4 m above the ground