WAEC Physics 2014 Objective — Question 2
Question 2 of 50 from the West African Examinations Council (WAEC) Physics 2014 Objective paper, with the correct answer and a full explanation.
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An object of mass m moves with a uniform speed v round a circular path of radius r. If its angular speed is ω, the magnitude of the centripetal force acting on it is
- A. mω²rCorrect
- B. mv²/r
- C. mωr
- D. mv²/r²
Explanation
Centripetal force F = mω²r = mv²/r; expressed in terms of angular speed ω, F = mω²r.
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