WAEC Physics 2021 Objective — Question 24
Question 24 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.
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24. Which of the following statements about the universal gravitational constant, G, is true?
- A. It is a fundamental quantity
- B. It has dimensions M⁻¹L³T⁻²Correct
- C. Its S.I. unit is N m² kg⁻¹
- D. It is a vector quantity
Explanation
From F=Gm₁m₂/r², G=Fr²/m₁m₂, giving SI unit Nm²kg⁻² and dimensions M⁻¹L³T⁻².
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