Neco 2022 Physics Question 6

Practice essay / theory question 6 from the 2022 Neco Physics examination. This question covers Machines, Mechanical Advantage, Efficiency .

Neco 2022 Physics Essay / Theory
Topics: Machines Mechanical Advantage Efficiency
Question 6 NECO • 2022 • PHYSICS • essay

A wheel‑and‑axle system is used to lift a load. The wheel has a radius of 0.40 m and the axle a radius of 0.05 m. An effort of 30 N is applied tangentially to the rim of the wheel. The load attached to the axle is 200 N. Assume the rope does not slip on the wheel or axle.

Question Parts

( a )
For an ideal (frictionless) wheel‑and‑axle:
( ) Calculate the ideal mechanical advantage (IMA).
( ) Determine the theoretical load that could be lifted with the given effort.
( b )
In practice the upward force on the load is measured to be 150 N when the same 30 N effort is applied. Calculate the efficiency of the system and give two possible reasons for the loss of efficiency.
( c )
If the wheel radius is increased to 0.60 m while the axle radius remains 0.05 m and the effort stays 30 N, find the new IMA and the theoretical load. Comment briefly on how this change influences the effort required to lift a given load.

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About This Question

This is Neco 2022 Physics Question 6. It is one of the essay questions from the 2022 Neco Physics examination.

The question covers Machines, Mechanical Advantage, Efficiency .

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