Newton's Law of Gravitation states that two bodies with masses and attract each other with a force where is the distance between the bodies and is the gravitational constant.

Use Newton's Law of Gravitation to compute the work (in J) required to launch a 1000-kg satellite vertically to an orbit 1000 km high. You may assume that Earth's mass is and is concentrated at its center. Take the radius of the Earth to be and

Work done = J