A 1 kg ball is 10 m above the surface of the earth. The mass of the earth is 6*10^24 kg. The initial velocity of the ball and the earth are both zero. The ball is dropped and once the ball and earth collide they stay together. How fast is the ball moving before it collides with the earth? How fast is the earth moving just before it collides with the ball? How fast are the ball and earth moving after the collisions? What is the momentum of the system when the ball is released? What is the momentum of the system just before the ball collides with the earth?

Question

A 1 kg ball is 10 m above the surface of the earth.  The mass of the earth is 6*10^24 kg.  The initial velocity of the ball and the earth are both zero.  The ball is dropped and once the ball and earth collide they stay together.  How fast is the ball moving before it collides with the earth?  How fast is the earth moving just before it collides with the ball?  How fast are the ball and earth moving after the collisions?  What is the momentum of the system when the ball is released?  What is the momentum of the system just before the ball collides with the earth?

irishboy123 · Answer

show some workings :p