A NASA satellite has just observed an asteroid that is on a collision course with the Earth. The…

A NASA satellite has just observed an
asteroid that is on a collision course with the Earth. The asteroid has an
estimated mass, based on its size, of 5 X 109kg. It is approaching
the Earth on a head on course with a velocity of 660 m/s relative to the Earth
and is now 5.0 X 106km away. With what speed will it hit the Earth’s
surface, neglecting friction with the atmosphere?