Multiple choice

What are the units for the universal constant of gravitation?

  1. kg-s

  2. N kg2 / m2

  3. N m/kg

  4. N m2 / kg2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The universal gravitational constant G is derived from the formula F = G(m1*m2)/r^2. Rearranging for G gives G = F*r^2 / (m1*m2), which results in the units N*m^2/kg^2.

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