International A Level (IAL)PhysicsEdexcelExam Questions5. Thermodynamics, Radiation, Oscillations & CosmologyGravitational Fields

Gravitational Fields (Edexcel International A Level (IAL) Physics): Exam Questions

Exam code: YPH11

45 mins9 questions

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Gravitational Fields

1
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1 mark

A helium nucleus approaches a gold nucleus. An electric force and a gravitational force act on each nucleus.

Which statement about these forces is not correct?

  • The electric force between the nuclei is repulsive.

  • The electric force is always smaller than the gravitational force.

  • Both forces increase as the nuclei approach.

  • The gravitational force between the nuclei is attractive.

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2
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1 mark

The gravitational field strength on the surface of Mercury is gM. Callisto, a moon of Jupiter, has the same radius as Mercury but only one third of its density.

What is the gravitational field strength on the surface of Callisto?

  • gM9

  • gM3

  • 3gM

  • 9gM

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3
1 mark

The gravitational field strength at Earth's surface is g and the radius of the Earth is R. A satellite orbits at height h above Earth's surface.

Which of the following expressions gives the gravitational field strength at the satellite?

  • g(RR+h)2

  • g(Rh)2

  • g (RR+h)

  • gR+h

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