Igcse Model Questions Vol1 2021 Physics Question 25
Practice objective / multiple choice question 25 from the 2021 Igcse Model Questions Vol1 Physics examination.
A simple lever is used to lift a load. The lever is \(1.2\ \text{m}\) long and is pivoted \(0.3\ \text{m}\) from the effort end. The effort is applied vertically downward at the effort end and moves through a distance of \(0.8\ \text{m}\). The load is lifted vertically upward at the load end and moves through a distance of \(0.2\ \text{m}\). The load has a weight of \(150\ \text{N}\). The overall efficiency of the system is \(80\%\).\n\n(a) Calculate the magnitude of the effort force required (in newtons).\n\n(b) If the effort is applied at a constant speed taking \(2\ \text{s}\) to move through its distance, determine the power output of the system (in watts, to two significant figures).
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About This Question
This is Igcse Model Questions Vol1 2021 Physics Question 25. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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