Determine their motion after the collision assuming that there is no friction?

A 5.00 kg mass moving at 4.00 m/s collides with a 3.00 kg mass moving at 9.00 m/s in the opposite direction. The masses stick together after collision.



A) Determine their motion after the collision assuming that there is no friction?



B) What is the difference in kinetic energy before and after the collision? What happened to the kinetic energy that was lost or gained?Determine their motion after the collision assuming that there is no friction?1.) If the stick together after collision then it is an inelastic collision. The formula for that is:

(m1 * vi1) + (m2* vi2) = (m1 + m2)*V

The (i) stands for intial velocity. The momentum before and after a collision must be equal.



2.) Energy in general is never "lost" it just might have transfered. And because kinetic energy depends on movement, after the crash it will be lower due to the transfer of energy to heat, damage, sound, ect.