Gravitational potential Quiz
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5 questions, one answer each
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1. As a satellite moves away from the Earth, its gravitational potential
- A. decreases and becomes more negative
- B. increases towards zero
- C. stays constant
- D. becomes positive
2. A mass moves between points with potentials −8.0 MJ kg⁻¹ and −5.0 MJ kg⁻¹. What is the work done on a 2.0 kg mass by an external force?
- A. 6.0 MJ
- B. −6.0 MJ
- C. 3.0 MJ
- D. 26 MJ
3. The gradient of a graph of V against r outside a planet is equal to
- A. g
- B. −g
- C. GM
- D. −GM/r
4. What is the change in potential energy of a mass when it moves along an equipotential surface?
- A. Positive
- B. Negative
- C. It depends on the path
- D. Zero
5. The area under a graph of g against r between two radii represents
- A. the work done
- B. the force on a body
- C. the potential difference ΔV
- D. the mass of the planet