A meteor whose mass was about struck the Earth with a

Chapter 7, Problem 74

(choose chapter or problem)

A meteor whose mass was about struck the Earth with a speed of about and came to rest in the Earth. (a) What was the Earths recoil speed (relative to Earth at rest before the collision)? (b) What fraction of the meteors kinetic energy was transformed to kinetic energy of the Earth? (c) By how much did the Earths kinetic energy change as a result of this collision?

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