Neco 2024 Physics Question 22

Practice objective / multiple choice question 22 from the 2024 Neco Physics examination.

Neco 2024 Physics Objective / Multiple Choice Medium Difficulty
Question 22 NECO • 2024 • PHYSICS • objective

A system consists of a movable pulley of radius \(0.15\ \text{m}\) attached to a load of weight \(120\ \text{N}\). The rope passes over a fixed pulley and the effort is applied to the free end of the rope. The axle of the movable pulley has a friction torque of \(0.5\ \text{N m}\). (a) Determine the magnitude of the effort force required to lift the load at constant speed. (b) Calculate the efficiency of the system as a percentage.

Answer Options

A. Effort \(= 55.55\ \text{N}\); Efficiency \(\approx 90.0\%\)
Correct Answer B. Effort \(= 63.33\ \text{N}\); Efficiency \(\approx 94.8\%\)
C. Effort \(= 70.00\ \text{N}\); Efficiency \(\approx 85.0\%\)
D. Effort \(= 60.00\ \text{N}\); Efficiency \(\approx 80.0\%\)
Correct Answer
B
Correct Option:
Effort \(= 63.33\ \text{N}\); Efficiency \(\approx 94.8\%\)

About This Question

This is Neco 2024 Physics Question 22. It is one of the objective questions from the 2024 Neco Physics examination.

Difficulty level: Medium .

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