Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
You drop the box. As it falls to its original level, its kinetic energy is 100 J.

Question

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. 
You drop the box. As it falls to its original level, its kinetic energy is 100 J.

Quizplus · Accepted Answer

This is true according to the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred or transformed. The potential energy gained by lifting the box is equal to the kinetic energy it gains during the fall. Therefore, if the kinetic energy of the box during the fall is 100 J, the potential energy gained during lifting the box up the stairs must also be 100 J.

Consider a Situation Where You Carry a 20-N Box Up