A truck with a mass of 1350 kg and moving with a speed of 12.0
m/s rear-ends a 821-kg car stopped at an intersection. The
collision is approximately elastic since the car is in neutral, the
brakes are off, the metal bumpers line up well and do not get
damaged. Find the speed of both vehicles after the collision.
vcar = ___________________ m/s
vtruck = ____________________ m/s