A .004 kg bullet is moving horizontally with a velocity of +355 m/s, where the + sign indicates that is moving to the right. The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely during the 1st block and embeds itself in the 2nd block. Note that both blocks are moving after the collision with the bullet. The mass of the 1stblock is 1.15 kg and its velocity is +0.55 m/s after the bullet pass through it. The mass of the 2nd block is 1.53 kg.
1) What is the velocity of the 2nd block after the bullet imbeds it, v2?
2) Discover the ration of the total kinetic energy after the collision to the total kinetic energy before the collision.