Two carts, joined together with a spring-loaded mechanism between them, move along on an air track at constant speed. The carts have different inertia, and the heavier cart is in front of the lighter cart. Then the mechanism is released, after which the speeds of the carts relative to each other is four times their original speed relative to the ground. In what direction is the lighter cart moving after the mechanism is released?

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

When is this