Neco Model Questions Vol1 2025 Physics Question 24
Practice objective / multiple choice question 24 from the 2025 Neco Model Questions Vol1 Physics examination.
A block of mass \(12\ \text{kg}\) is lifted vertically by a rope that passes over a fixed pulley of radius \(0.15\ \text{m}\). The pulley's axle has a bearing that exerts a constant frictional torque of \(0.30\ \text{N·m}\) opposing rotation. The system raises the block at constant speed. If the rope is pulled with a force \(F\), (a) find the magnitude of \(F\) required, and (b) calculate the overall mechanical efficiency of the system (output work divided by input work). Take \(g = 9.8\ \text{m s}^{-2}\).
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This is Neco Model Questions Vol1 2025 Physics Question 24. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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