PE_elastic = 1 over 2 1 2 kx²

Law of Conservation of Energy Equation

KE₁ + PE₁ = KE₁ + PE₁

ME = KE + PE

A 100 kg rock is sitting at the top of a hill at a height of 100 m.

A 20 kg car is moving at a rate of 50 m/s.

Mechanical Energy Equation

PE_g = mgh

KE = 1 over 2 1 2 mv²

Potential Energy Elastic Equation