If earth were twice as far from the sun, the force of gravity attracting the earth to the sun would be
a. twice as strong
b. half as strong
c. one-quarter as strong.
can someone explain this one for me ? : )

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.

Since the pully is a simple machine so the mechanical advantage is a 1