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(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: