A meteor whose mass was about 10^8 kg struck the Earth (m = 6.0 X10^24 kg) with a speed of about 11 km/s and came to rest in the Earth.(adsbygoogle = window.adsbygoogle || []).push({});

(a) What was the Earth's recoil speed? (m/s)

(b) What fraction of the meteor's kinetic energy was transformed to kinetic energy of the Earth? (%)

(c) By how much did the Earth's kinetic energy change as a result of this collision? (J)

I know this problem requires a look at conservation of momentum and conservation of energy principles, but I am having trouble just trying to start this problem out :grumpy:

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

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: Linear Momentum and Collisions of meteor

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