Exam-style question
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What is the gravitational potential at a point in a field if the work done to move a 2 kg mass from infinity to that point is 100 J?.
- A.50 J/kg
- B.100 J/kg
- C.200 J/kg
- D.25 J/kg
Model answer
What a good answer should say
- 50 J/kg
Explanation
Why this works
Gravitational potential is defined as the work done per unit mass. Here, the work done is 100 J for a mass of 2 kg.
Thus, gravitational potential = 100 J / 2 kg = 50 J/kg. This shows how gravitational potential is calculated based on the work done and the mass.
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