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1. The magnitude of the force the sun exerts on Uranus is 1.41X10^21 newtons. Explain how it is possible for the sun to exert a greater forceo n Uranus then Neptune exerts on Uranus.

2. A 2.0 kg object is falling freely near Earth's surface. What is the magnitude of the gravitational force that Earth exerts on the object?

a) 20 N B) 2.0 N C) 0 N D) 0.20 N

3. Gravitational force F exists between point objects A and B separated by distanace R. If the mass of A is doubled and distance R is tripled, what is the new gravitational force between A and B?

A) 9/2 F B) 2/3 F C) 2/9 F D) 3/2 F

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