Which of Newton's laws states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted on by an unbalanced
force?
A. Newton's first law
B. Newton's law of universal gravitation
C. Newton's second law
D. Newton's third law

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.

A) acceleration. this seems to be the one that makes sense.

This is the answer: body 1 + engine 2