Newton's Law of Gravitation

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The following physics revision questions are provided in support of the physics tutorial on Newton's Law of Gravitation. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Newton's Law of Gravitation tutorials. The Newton's Law of Gravitation calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Gravitation Learning Material
Tutorial IDTitleTutorialVideo
8.1Newton's Law of Gravitation

Newton's Law of Gravitation Revision Questions

1) The orbital period of an artificial satellite revolving with engines turned off around the Moon at a distance of 1,737 km from the lunar centre is 2.0 hours. Calculate the mass of the Moon if no other factor but gravitational force between the Moon and satellite is taken into consideration.

  1. 5.974 × 1018 kg
  2. 3.985 × 1022 kg
  3. 5.974 × 1022 kg
  4. 3.985 × 1018 kg

Correct Answer: C

2) At what tangential velocity must an object at 429 km above the Earth surface move to turn into an artificial satellite? Take radius of Earth 6371 km and mass of the Earth equal to 5.972 × 1024 kg.

  1. 6.802 × 103 m/s
  2. 2.42 × 107 m/s
  3. 2.42 × 103 m/s
  4. 5.857 × 106 m/s

Correct Answer: A

3) Two satellites, one geostationary and the other geosynchronous are at the same position in a given instant. How far from each other will they be after 12 hours? Take the radius of Earth equal to 6371 km.

  1. 42157 km
  2. 84314 km
  3. 40010 km
  4. 91577 km

Correct Answer: B

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  5. Continuing learning gravitation - read our next physics tutorial: Gravitational Potential Energy. Kepler Laws

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