WAEC Physics 2025 Objective — Question 23
Question 23 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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A bucket of water of mass 10kg is swung in a vertical circle of radius 1.2m. While at the lowest position of the swing, its speed is 5 ms⁻¹. Determine the tension in the string. [g = 10 ms⁻²]
- A. 41.7N
- B. 141.7N
- C. 208.3N
- D. 308.3NCorrect
Explanation
At the lowest point, T = mg + mv²/r = (10×10) + (10×5²)/1.2 = 100 + 250/1.2 = 100 + 208.3 = 308.3N.
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