Question

An object with a potential energy of 200 joules is dropped from a height of 2.00 meters. What is its kinetic energy when it reaches the ground?

Answer 1

0.47kg

Answer 2

That answer doesn't even make sense. Kinetic energy is measured in Joules not Kilograms.

Answer 3

lol

Answer 4

Total energy is conserved, so when the object is at the top and when it is at the bottom, there is a total of 200 Joules of energy split between potential and kinetic energy. The only difference is how the 200 Joules are divided between potential and kinetic energy. At the top, there is 200J of potential, and 0 kinetic. At the bottom, there is still 200J of total energy, but of that 200, 0 of it is potential, meaning all 200J must be kinetic. TLDR on the ground it has 200J of kinetic energy