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NEET UG Gravitation — practice questions — page 5

Explore 126 free Gravitation questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Gravitation questions and exercises with answers

Showing questions 121–126 of 126.

Local changes in g caused by mountains and rock density are called:Read the answer and worked solution →What is the measurement of Earth's gravity called?Read the answer and worked solution →Dense ore-bearing rock below a site makes local g:Read the answer and worked solution →Apart from m/s², acceleration due to gravity can also be expressed in:Read the answer and worked solution →A rock weighs 72 N on Earth's surface. Its weight at height R_E/2 above the surface is:Read the answer and worked solution →For a uniform-density Earth, a 100 N body taken to depth R_E/4 weighs:Read the answer and worked solution →

Worked practice questions

Local changes in g caused by mountains and rock density are called:

  1. Geoid ripples
  2. Tidal bulges
  3. Gravity anomalies
  4. Isostatic waves
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Correct answer: C. Gravity anomalies

Regional departures of the gravitational field caused by topography and geology are known as gravity anomalies.

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What is the measurement of Earth's gravity called?

  1. Gravimetry
  2. Seismology
  3. Magnetometry
  4. Barometry
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Correct answer: A. Gravimetry

Gravimetry is the name for measuring the strength of Earth's gravitational field, using instruments called gravimeters.

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Dense ore-bearing rock below a site makes local g:

  1. Slightly lower than normal
  2. Slightly higher than normal
  3. Unchanged from normal
  4. Higher only near the poles
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Correct answer: B. Slightly higher than normal

Extra mass from dense ore-bearing rock adds to the local pull, giving a higher than normal gravity reading.

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