Question

question 7 of 25
which of the following statements describes a perfectly inelastic collision?
a. a wad of chewing gum is thrown and sticks to a moving truck.
b. two billiard balls bounce off of each other.
c. two ice skaters hit each other and fall over in opposite directions.
d. a car crashes into a tree and rebounds in the other direction.

Explanation:

A perfectly inelastic collision is one where the colliding objects stick together after the collision. In option A, the chewing gum sticks to the truck, which is characteristic of a perfectly inelastic collision. In option B, billiard balls bouncing off each other is an elastic collision. In option C, skaters falling in opposite directions is not a case of sticking together. In option D, the car rebounding is also not a case of sticking.

Answer:

A. A wad of chewing gum is thrown and sticks to a moving truck.