| An object weighs 100. newtons on Earth’s surface. When it is moved to a point one Earth radius above Earth’s surface, it will weigh|
Correct Answer Number: 1
Explanation: Basic equation Fg=Gm1m2/r2.
When the object is moved 1 earth radius away from the earth r is now 2r (on the surface of the earth the object is 1 earth radius away from the center of the earth, when the object is moved 1 radius away the distance is now r+r or 2r).
When you plug (2r)2 into the denominator of the equation it becomes 4r2. You have to square the 2 as well as the r.