A meteor whose mass was about 10^8 kg struck the earth (m = 6.0 X 10^24) with a speed of about 15 km/s and came to rest in the earth. A) what was the earth's recoil speed? B) what fraction of the meteor's KE was transformed into KE of the earth? C) By how much did the Earth's KE change as a result of this collison. I know how to figure out part A. m1v1/m2 = v2 = 2.5 X 10^-12 A little guidance on B and C please?