a 3 kg rock is falling from a rock ledge in the absence of air resistance how much force will the rock strikes the ground with

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.

An atom that has fewer electrons that protons is called a positive ion.

Ithink the answer is c. make unnecessarily  wide gestures