Gce Model Questions Vol1 2020 Physics Question 13
Practice objective / multiple choice question 13 from the 2020 Gce Model Questions Vol1 Physics examination.
A movable pulley of negligible mass has a rim radius of \(0.20\,\text{m}\). The axle of the pulley exerts a constant resisting torque of \(5\,\text{N·m}\) due to friction. A load of mass \(40\,\text{kg}\) is attached to the pulley, and a horizontal force \(F\) is applied to the free end of the rope, pulling upward. (a) Determine the minimum magnitude of \(F\) required to lift the load at constant speed. (b) Calculate the mechanical efficiency of the system under this condition. Use \(g=9.8\,\text{m s}^{-2}\).
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About This Question
This is Gce Model Questions Vol1 2020 Physics Question 13. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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