11. A ball of mass 0.440 kg moving east ( + x direction) with a speed of 3.8 m/s collides head-on with a 0.220-kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?

Box 1 is sitting at rest. Box 2 is moving to the left when it collides elastically with Box 1 (see figure). The surface is frictionless. Take the right to be the positive x-direction.The mass of Box 1 is 4.00 kg. The mass of Box 2 is 7.00 kg. The speed of Box 2 is 1.40 m/s before the collision. The speed of Box 1 is 2.00 m/s after the collision.What is the velocity of Box 2 after the collision?

A 40 kg ball moving to the right at 5.0m/s collides head-on with the stationary 2.0 kg ball. If the collision is elastic, determine the direction and speed of each ball after the collision.

A 6.2 g bullet is fired into a 179 g block that is initially at rest at the edge of a frictionless, 0.6 m high table. The bullet remains in the block, and after impact, the block lands 2.9 m from the edge of the table. What was the speed of the bullet before impact?