Exam-style question
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How does gravitational potential differ from gravitational field strength?.
- A.Gravitational potential is the energy per unit mass, while gravitational field strength is the force per unit mass.
- B.Gravitational potential is a force, while gravitational field strength is energy.
- C.Gravitational potential is measured in newtons, while gravitational field strength is measured in joules.
- D.Gravitational potential is constant, while gravitational field strength varies.
Model answer
What a good answer should say
- Gravitational potential is the energy per unit mass, while gravitational field strength is the force per unit mass.
Explanation
Why this works
Gravitational potential is defined as the work done to move a mass from infinity to a point in a gravitational field per unit mass, while gravitational field strength is defined as the force experienced by a unit mass placed in the field. The key difference is that gravitational potential is a measure of energy, whereas gravitational field strength is a measure of force.
This distinction is crucial when analyzing gravitational interactions, concluding that both concepts are essential for understanding gravitational fields.
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