A NASA satellite has just observed an asteroid that is on a collision...

[peterd]

If it's travelling at 604ms^-1 then due to newtons second law should hit earth at the same speed of 604ms^-1. newtons second law states that an object will move at a constant verlocity or remain at rest unless an outside force acts upon it.

[col_bs]

...course with the Earth. The asteroid has? 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 × 109 kg. It is approaching the Earth on a head-on course with a velocity of 604 m/s relative to the Earth and is now 5.0 × 106 km away. With what speed will it hit the Earth's surface, neglecting friction with the atmosphere?
sorry, this is a physics problem

[PaulC]

oh jeez... i thought you were serious....