Aball of mass 5.0kg is lifted off the floor a distance of 1.7m. 1. what is the change in the gravitational potential energy of the ball? 2. now you release the ball from rest, and it falls to the floor. what is the kinetic energy of the ball just before it hits the floor? 3. what is the velocity of ball just before it hits the floor?

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.