Field Theory Worksheet

Main Page > Solutions to Worksheets >Field Theory Worksheet

About this page

All images uploaded for this page must start with the string "Field_Theory_Worksheet-" so the image DCS3421.jpg associated with this page should be uploaded as "Field_Theory_Worksheet-DCS3421.jpg". This way we can avoid conflicts in the image directory, and we can find images easily.
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

Table of Contents

---

2. What force does a 34 N/kg gravitational field exert on a 72.5 kg mass?

Solution goes here

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

7. What is the gravitational potential (in J/kg) 12 cm from the center of a 212 kg ball of lead?

Solution goes here

Table of Contents

---

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

Table of Contents

---

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 =mgh, where we assume g is a uniform 9.81 N/kg

Solution goes here

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

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

Table of Contents

---

16. Question

Solution goes here

Table of Contents

---

17. Question

Solution goes here

Table of Contents

---

18. Question

Solution goes here

Table of Contents

---

19. Question

Solution goes here

Table of Contents

---

20. Question

Solution goes here

Table of Contents

---

21. Question

Solution goes here

Table of Contents

---

22. Question

Solution goes here

Table of Contents

---

23. Question

Solution goes here

Table of Contents

---

24. Question

Solution goes here

Table of Contents

---

25. Question

Solution goes here

Table of Contents

---

26. Question

Solution goes here

Table of Contents

---

27. Question

Solution goes here

Table of Contents

---

28. Question

Solution goes here

Table of Contents

---

29. Question

Solution goes here

Table of Contents

---

30. Question

Solution goes here

Table of Contents

---