Waec Model Questions Vol1 2017 Agricultural Science Question 40
Practice objective / multiple choice question 40 from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
A farmer wants to lift a 150 kg sack of grain onto a platform 1.2 m high using a simple lever. The lever is a rigid beam 2.0 m long with the fulcrum placed 0.5 m from the load end, giving a load arm of 0.5 m and an effort arm of 1.5 m. Assuming an ideal, frictionless lever and g = 9.8 m s⁻²: a) Calculate the minimum effort force (in newtons) the farmer must apply at the effort end to lift the sack. b) If the farmer can exert only 200 N, determine the minimum length of the effort arm (keeping the load arm at 0.5 m) that will allow the sack to be lifted.
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About This Question
This is Waec Model Questions Vol1 2017 Agricultural Science Question 40. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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