(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In an inelastic collision, momentum is conserved but kinetic energy is not conserved. How can this be true in the situation where a car runs into the back of a stationary truck, since after the collision neither are moving and so cannot have momentum?

2. Relevant equations

3. The attempt at a solution

If neither the car nor the truck is moving than the momentum must have transferred to the earth and the earth is actually moving. Although itâ€™s mass is so large that the velocity is basically undetectable.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Conservation of momentum

**Physics Forums | Science Articles, Homework Help, Discussion**