A meteor whose mass was about 1.4×10^8kg struck the Earth (Mass of earth = 6.0 x 10^24 kg) with a speed of about 18km/s and came to rest in the Earth. what was the earth's recoil speed? what fraction of the metoer's kinetic energy was transformed to kinetic energy of the earth? by how much did the earth's kinetic energy change as a result of this collision?