Field Theory Worksheet
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Contents
- 1 About this page
- 2 Problems
- 2.1 1. What is the gravitational field strength at the surface of a planet if 5.3 kg of mass experiences 67.2 N of downward force due to gravity?
- 2.2 2. What force does a 34 N/kg gravitational field exert on a 72.5 kg mass?
- 2.3 3. What is the force of gravity between a 674 kg object that is 7.15x106 m from earth’s center? (Earth has a mass of 5.97x1024 kg)
- 2.4 4. At what distance from the center of the moon is the force of gravity on a 100.0 kg mass 5.00 N? (The moon has a mass of 7.35x1022 kg)
- 2.5 5. What is the change in gravitational potential (in J/kg) if it takes 812 J of energy to lift a 34 kg object from the floor to a shelf? If g is 9.81 N/kg, what is the shelf height?
- 2.6 6. A 117 kg mass falls freely from rest through a gravitational potential difference of 45 J/kg. What potential energy in J does it turn into kinetic energy, and what is its final velocity?
- 2.7 7. What is the gravitational potential (in J/kg) 12 cm from the center of a 212 kg ball of lead?
- 2.8 8. What is the gravitational potential (in J/kg) at the surface of the moon? (The moon has a mass of 7.35x1022 kg and a radius of 1.737x106 m)
- 2.9 9. The earth has a mass of 5.97x1024 kg, and a radius of 6.38x106 m. What work does it take to bring a 5.00 kg object from the surface of the earth to an elevation of 4.15x106 m above the earth’s surface? How does that compare to the same calculation using Ep =mgh, where we assume g is a uniform 9.81 N/kg
- 2.10 10. An object approaches the moon. ( Moon’s mass: 7.35 x 1022 kg, radius: 1.737 x 106 m) If the object is going 1210 m/s when it is 2.26 x 106 m from the moon’s center, what is its speed when it strikes the surface?
- 2.11 11. How much work does it take to move two 4.5x106 kg spheres whose centers are separated by 3.5 m initially, so that their centers are separated by 7.8 m?
- 2.12 12. What is the gravitational field strength on the surface of the moon with a radius of 1.737x106 m, and a mass of 7.35x1022 kg?
- 2.13 13. What is the radius of a neutron star with a gravitational field strength of 3.4x1013 N/kg, and a mass of 8.13x1031 kg?
- 2.14 14. The top of a hill is 420 J/kg higher in gravitational potential than the bottom. What work does it take to lift a 5.0 kg object from the bottom of the hill to the top? If the g is 9.81 N/kg, how high is the hill?
- 2.15 15. On the planet Zot, a hill 23.1 m high represents a potential change of 416 J/kg of gravitational potential. What is the g on planet Zot?
- 2.16 16. Question
- 2.17 17. Question
- 2.18 18. Question
- 2.19 19. Question
- 2.20 20. Question
- 2.21 21. Question
- 2.22 22. Question
- 2.23 23. Question
- 2.24 24. Question
- 2.25 25. Question
- 2.26 26. Question
- 2.27 27. Question
- 2.28 28. Question
- 2.29 29. Question
- 2.30 30. Question
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Table of Contents
Problems
1. What is the gravitational field strength at the surface of a planet if 5.3 kg of mass experiences 67.2 N of downward force due to gravity?
Solution goes here
2. What force does a 34 N/kg gravitational field exert on a 72.5 kg mass?
Solution goes here
3. What is the force of gravity between a 674 kg object that is 7.15x106 m from earth’s center? (Earth has a mass of 5.97x1024 kg)
Solution goes here
4. At what distance from the center of the moon is the force of gravity on a 100.0 kg mass 5.00 N? (The moon has a mass of 7.35x1022 kg)
Solution goes here
5. What is the change in gravitational potential (in J/kg) if it takes 812 J of energy to lift a 34 kg object from the floor to a shelf? If g is 9.81 N/kg, what is the shelf height?
Solution goes here
6. A 117 kg mass falls freely from rest through a gravitational potential difference of 45 J/kg. What potential energy in J does it turn into kinetic energy, and what is its final velocity?
Solution goes here
7. What is the gravitational potential (in J/kg) 12 cm from the center of a 212 kg ball of lead?
Solution goes here
8. What is the gravitational potential (in J/kg) at the surface of the moon? (The moon has a mass of 7.35x1022 kg and a radius of 1.737x106 m)
Solution goes here
9. The earth has a mass of 5.97x1024 kg, and a radius of 6.38x106 m. What work does it take to bring a 5.00 kg object from the surface of the earth to an elevation of 4.15x106 m above the earth’s surface? How does that compare to the same calculation using Ep =mgh, where we assume g is a uniform 9.81 N/kg
Solution goes here
10. An object approaches the moon. ( Moon’s mass: 7.35 x 1022 kg, radius: 1.737 x 106 m) If the object is going 1210 m/s when it is 2.26 x 106 m from the moon’s center, what is its speed when it strikes the surface?
Solution goes here
11. How much work does it take to move two 4.5x106 kg spheres whose centers are separated by 3.5 m initially, so that their centers are separated by 7.8 m?
Solution goes here
12. What is the gravitational field strength on the surface of the moon with a radius of 1.737x106 m, and a mass of 7.35x1022 kg?
Solution goes here
13. What is the radius of a neutron star with a gravitational field strength of 3.4x1013 N/kg, and a mass of 8.13x1031 kg?
Solution goes here
14. The top of a hill is 420 J/kg higher in gravitational potential than the bottom. What work does it take to lift a 5.0 kg object from the bottom of the hill to the top? If the g is 9.81 N/kg, how high is the hill?
Solution goes here
15. On the planet Zot, a hill 23.1 m high represents a potential change of 416 J/kg of gravitational potential. What is the g on planet Zot?
Solution goes here
16. Question
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17. Question
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18. Question
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19. Question
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20. Question
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21. Question
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22. Question
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23. Question
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24. Question
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25. Question
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26. Question
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27. Question
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28. Question
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29. Question
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30. Question
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