Abullet is fired at 550 m/s strikes a fixed block of wood that is 6.5 cm thick. the
bullet travels through the block and exits with a speed of 420 m/s. what was the average
force exerted on the bullet by the block?

During cooling, the kinetic energy of the molecules falls. why does this happen? a.the motion of the molecules increases. b. the motion of the molecules slows down. c.the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.