WAEC Physics 2013 Objective — Question 2
Question 2 of 50 from the West African Examinations Council (WAEC) Physics 2013 Objective paper, with the correct answer and a full explanation.
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Which of the following units is equivalent to the Watt?
- A. kgms⁻²
- B. kgm²s⁻³Correct
- C. kgm²s⁻¹
- D. kgms⁻¹
Explanation
Watt is the SI unit of power. Power = force × velocity = mass × acceleration × velocity. Therefore Watt = kg × ms⁻² × ms⁻¹ = kgm²s⁻³.
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