# Asteroid: Potential/Kinetic Energy, Angular Momentum

by Emanresu12
Tags: angular, asteroid, energy, momentum
 HW Helper PF Gold P: 3,440 The potential energy change is $$-\frac{GMm}{r_f}- \large( -\frac{GMm}{r_i}\large)=GMm(\frac{1}{r_i}-\frac{1}{r_f})$$ It looks like you have $$\frac{GMm}{r_i-r_f}$$ in your expression.