WAEC Physics 2015 Objective — Question 11
Question 11 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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Two strings each inclined at an angle of 30° to the horizontal are used to hold a bucket of water weighing 20 N. Calculate the tension in each string.
- A. 20√3 N
- B. 20 NCorrect
- C. 10√3 N
- D. 10 N
Explanation
By symmetry, the two equal tensions each make 60° with the horizontal (30° with the vertical each side), and applying the sine rule/resolving forces gives T₁ = T₂ = 20 N.
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