Waec Model Questions Vol1 2020 Physics Question 6

Practice essay / theory question 6 from the 2020 Waec Model Questions Vol1 Physics examination. This question covers Machines .

Waec Model Questions Vol1 2020 Physics Essay / Theory

Topic: Machines

Question 6 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • essay

A block‑and‑tackle system consists of one fixed pulley and one movable pulley. A load of 80 N is lifted vertically. An effort of 30 N is applied to the free end of the rope, which is pulled downwards at a speed of 0.60 m s⁻¹. The load rises at a speed of 0.20 m s⁻¹. Assume the rope and pulleys are mass‑less.

Question Parts

( a )

Calculate the mechanical advantage (MA) of the system.

( b )

State the ideal velocity ratio (VR_ideal) for this arrangement.

( c )

Determine the actual velocity ratio (VR_actual) and the efficiency of the system (expressed as a percentage).

( d )

Calculate the power input and the useful power output of the system.

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About This Question

This is Waec Model Questions Vol1 2020 Physics Question 6. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Physics examination.

The question covers Machines .

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