# Problem 8-86 Inelastic collision - B

A large ball of modeling clay \((\text{mass}\; 4.5 \times 10^2\; g)\) is rolled on a tabletop so that it collides with a stationary small wooden box \((\text{mass} \; 7.9\times 10^2\; g)\). The collision is completely inelastic, and the ball and box then slide on the table for a distance of \(5.1 \;cm\). If the speed of the ball is \(2.2\; m/s\) just before the collision, determine: (a) the speed of the ball and box just after the collision (b) the magnitude of the friction force acting on the ball and box.

**Accumulated Solution**

No. Do you remember the difference between an "inelastic" and an "elastic collision"? It has to do with the \(KE\) in the collision.

An elastic collision is a special case where the \(KE\)

(A) is conserved

(B) is completely lost

(C) is lost to a maximum amount.