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The earths gravitational field intensity at its…

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PHYSICS

The earth’s gravitational field intensity at its surface is about…

(G = 6.7 x 10-11Nm2kg-2, mass of earth = 6 x 1024kg, radius of the earth = 6.4 x 106m, g = ms-2 )

  • A. 6.7N/kg
  • B. 7.9N/kg
  • C. 8.0N/kg
  • D. 9.8N/kg

QUICK ANSWER…

D

DETAILS…

The right formula for gravitational field intensity is given by:

Gravitational field intensity = force/mass

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But according to Newton’s law of universal gravitation,

The earth’s gravitational field intensity at its surface is

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is incorrect.
  3. C is incorrect.
  4. D is the correct answer.

KEY-POINTS…

You may please note these/this:

  • Gravitational field intensity is equal to force/mass
  • Electric field intensity is similar, it equal to force/charge

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/culled from 2019 JAMB-UTME physics question 34/

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