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  3. 1.  two 3 kg physical science textbooks on a

1.  Two 3 kg physical science textbooks on a book shelf are separated by 0.25 m. What...

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Physics

1.  Two 3 kg physical science textbooks on a bookshelf are separated by 0.25 m. What is the force of gravitationalattraction between the books?   

2. What is the force of gravity between two 1000 kg carsseparated by a distance of 20 m on a highway?

3. Using the force, calculated in # 2 above, and the weight ofthe car, calculate:     

Force (from #2) divided by the weight of car   

4. How would the force of gravity between two masses be affectedif the separation distance between them is doubled?

5. How would the force of gravity between two masses be affectedif the separation distance between them is decreased byone-half?

6. The separation distance between two 2.0 kg masses isdecreased by two-thirds. How is the gravitational force betweenthem affected?

7. A man has a mass of 150 kg. What does he weigh on earthexpressed in N?

8. If the gravitation constant on the moon, gm is one-sixth thaton the earth, how much does the man in # 7 weigh on the moon?

9. An astronaut on the moon places a package on a scale andfinds it weight to be 15 N. What would the package weigh onearth?

10. What is the package's mass on the moon?

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