WAEC Mathematics 2014 Objective — Question 14
Question 14 of 50 from the West African Examinations Council (WAEC) Mathematics 2014 Objective paper, with the correct answer and a full explanation.
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Make u the subject of the formula, E = (m/2g)(v²−u²).
- A. u=√(v²−2Eg/m)Correct
- B. u=√(v²−2Eg/(4))
- C. u=√(v−2Eg/m)
- D. u=√(2v²Eg/m)
Explanation
Multiply through by 2g/m: 2Eg/m = v²−u², so u² = v²−2Eg/m, giving u=√(v²−2Eg/m).
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