Recent content by sushiserv

  1. S

    Conservation of energy: How do I know?

    This is not so much a homework problem as it is a question: How do I know whether an object has kinetic energy or potential energy? I know for potential energy you make a point that is PE(grav) = 0, and then if the object reaches a height you make the other PE = mgh. So in (KE_2 - KE_1)...