Question

A car hurtles off a cliff and crashes on the canyon floor below. Identify the system in which the net momentum is zero during the crash.

Answer 1

It is given that a car ran off from a cliff and it crashes on canyon floor. Now the system of a car as well as the earth together have a
`\text{ net momentum of zero}` when the car crashes on the canyon floor, thus reducing the momentum of the car to zero. The earth also stops its upward motion and it also reduces the momentum to zero.