# AP physics

posted by
**Alica**
.

A 1.60-g bullet, moving at 542 m/s, strikes a 0.249-kg piece of wood at rest on a frictionless table. The bullet sticks in the wood, and the combined mass moves slowly down the table.

(a) Find the speed of the combination after the collision.

m/s

(b) Find the kinetic energy of the bullet before the collision.

J

(c) Find the kinetic energy of the combination after the collision.

J

(d) How much kinetic energy did the bullet lose?

J

(e) What percent of the bullet's original kinetic energy is lost?

%