Igcse Model Questions Vol1 2023 Physics Question 39

Practice objective / multiple choice question 39 from the 2023 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2023 Physics Objective / Multiple Choice Medium Difficulty
Question 39 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

A pulley system is used to lift a load of \(150\) N at constant speed. The system has four supporting rope sections, the input force applied is \(45\) N, and the rope moves at \(0.8\) m s\(^{-1}\).\n(a) Find the actual mechanical advantage of the system.\n(b) Determine the efficiency of the system (as a percentage).\n(c) Calculate the output power (in watts).\n(d) Calculate the input power (in watts).

Answer Options

A. AMA = 2.50, \\; \\eta = 83.3\\%, \\; P_{out}=30\\text{ W}, \\; P_{in}=36\\text{ W}
B. AMA = 3.33, \\; \\eta = 83.3\\%, \\; P_{out}=28\\text{ W}, \\; P_{in}=36\\text{ W}
C. AMA = 3.33, \\; \\eta = 75.0\\%, \\; P_{out}=30\\text{ W}, \\; P_{in}=40\\text{ W}
Correct Answer D. AMA = 3.33, \; \eta = 83.3\%, \; P_{out}=30\text{ W}, \; P_{in}=36\text{ W}
Correct Answer
D
Correct Option:
AMA = 3.33, \; \eta = 83.3\%, \; P_{out}=30\text{ W}, \; P_{in}=36\text{ W}

About This Question

This is Igcse Model Questions Vol1 2023 Physics Question 39. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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