a system comprising blocks, a light frictionless pulley, a frictionless incline, and connecting ropes is shown in the figure. the 9.0-kg block accelerates downward when the system is released from rest. the tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to:

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.