Neco 2021 Physics Question 6

Practice essay / theory question 6 from the 2021 Neco Physics examination. This question covers simple machines, mechanical advantage, work and energy .

Neco 2021 Physics Essay / Theory

Topics: simple machines mechanical advantage work and energy

Question 6 NECO • 2021 • PHYSICS • essay

The diagram shows a compound pulley system consisting of a fixed pulley attached to the ceiling and a movable pulley attached to a load of 200 N. A single light rope passes over the fixed pulley, is attached to the movable pulley, and the free end is pulled vertically upward by a student with a force \(F\). The rope and pulleys are assumed massless and frictionless. The student pulls the rope a distance of 0.5 m, causing the load to rise.

Question Parts

( a )

Determine the ideal mechanical advantage (IMA) of the system.

( b )

If the student applies a pulling force of 120 N, calculate the actual mechanical advantage (AMA) and the efficiency of the system.

( c )

The student pulls the rope through a distance of 0.5 m. Calculate (i) the work done by the student (input work) and (ii) the work done in raising the load (output work). Comment on how these values relate to the efficiency found in part (b).

( d )

Briefly discuss two practical advantages of using such a compound pulley system when lifting heavy loads.

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About This Question

This is Neco 2021 Physics Question 6. It is one of the essay questions from the 2021 Neco Physics examination.

The question covers simple machines, mechanical advantage, work and energy .

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