Bumper car A (281 kg) moving +2.81 m/s makes an elastic collision with Bumper car B (209 kg) moving +1.72 m/s. What is the velocity of car A after the collision?

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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.

That would be kinetic energy