Igcse Model Questions Vol1 2020 Physics Question 16

Practice objective / multiple choice question 16 from the 2020 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2020 Physics Objective / Multiple Choice Medium Difficulty
Question 16 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A block and tackle system consists of a fixed pulley and a movable pulley used to lift a load of 500 \(\text{N}\). The effort rope is pulled through a distance of 2.0 \(\text{m}\) while the load rises 0.8 \(\text{m}\). The axle of the movable pulley has a frictional torque of 2.0 \(\text{N·m}\) and its radius is 0.05 \(\text{m}\). (a) Calculate the ideal mechanical advantage (IMA). (b) Determine the actual mechanical advantage (AMA). (c) Find the efficiency of the system as a percentage.

Answer Options

A. IMA = 2.5, AMA ≈ 2.0, efficiency ≈ 80 %
Correct Answer B. IMA = 2.5, AMA ≈ 1.72, efficiency ≈ 69 %
C. IMA = 3.0, AMA ≈ 2.1, efficiency ≈ 70 %
D. IMA = 2.0, AMA ≈ 1.5, efficiency ≈ 55 %
Correct Answer
B
Correct Option:
IMA = 2.5, AMA ≈ 1.72, efficiency ≈ 69 %

About This Question

This is Igcse Model Questions Vol1 2020 Physics Question 16. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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