Igcse Model Questions Vol1 2023 Physics Question 6

Practice essay / theory question 6 from the 2023 Igcse Model Questions Vol1 Physics examination. This question covers machines, mechanical advantage, efficiency .

Igcse Model Questions Vol1 2023 Physics Essay / Theory

Topics: machines mechanical advantage efficiency

Question 6 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • essay

The diagram shows a compound pulley system used to lift a load. The system consists of a fixed pulley (P1) attached to the ceiling, a movable pulley (P2) attached to a load L of mass 20 kg, and a single rope that passes over the fixed pulley, under the movable pulley and is then pulled by a hand. The hand pulls the rope through a distance of 2.0 m while the load rises a distance of 0.5 m. When the hand is pulling, a force of 60 N is measured.

Question Parts

( a )

Determine the theoretical (ideal) mechanical advantage of the system using the distances shown in the diagram.

( b )

Calculate the ideal force that must be applied to the rope to lift the 20 kg load, ignoring any friction or other losses.

( c )

The hand actually exerts a force of 60 N. Calculate the efficiency of the system expressed as a percentage.

( d )

Briefly discuss two possible reasons why the efficiency is less than 100 %.

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About This Question

This is Igcse Model Questions Vol1 2023 Physics Question 6. It is one of the essay questions from the 2023 Igcse Model Questions Vol1 Physics examination.

The question covers machines, mechanical advantage, efficiency .

View More Igcse Model Questions Vol1 2023 Physics Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

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