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Units, Dimensions and Measurement — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsUnits, Dimensions and Measurement1 Mark
MCQ
A suitable unit for gravitational constant is
  • A
    $k g-m sec ^{-1}$
  • B
    $N m^{-1} sec$
  • ✓
    $N m^2 kg ^{-2}$
  • D
    $k g m sec ^{-1}$
✓

Answer

Correct option: C.
$N m^2 kg ^{-2}$
(c) $F=\frac{G m_1 m_2}{d^2} ; \therefore G=\frac{F d^2}{m_1 m_2}=\mathrm{Nm}^2 / \mathrm{kg}^2$

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