A small asteroid that has a mass of 120 kg is moving at 225 m/s when it is 1000 km above the Moon.
(a) How fast will the meteorite be traveling when it impacts the lunar surface if it is heading straight toward the center of the Moon? The radius of the Moon is 1.737 x 106 m.
(b) How much work does the Moon do in stopping the asteroid if neither the Moon nor the asteroid heat up in the process?