WAEC Physics 2020 Objective — Question 36
Question 36 of 50 from the West African Examinations Council (WAEC) Physics 2020 Objective paper, with the correct answer and a full explanation.
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In the hydraulic press, the force F applied is related to the diameter d of the cylinder by
- A. F is proportional to d^2Correct
- B. F is proportional to d
- C. F is proportional to d^-1
- D. F is proportional to d^-2
Explanation
In a hydraulic press, pressure transmission is constant: P=F/A=constant, so F=KA. F is proportional to A, and F is proportional to d^2 since A=(pi)d^2/4.
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