Gce Model Questions Vol1 2018 Agricultural Science Question 14
Practice objective / multiple choice question 14 from the 2018 Gce Model Questions Vol1 Agricultural Science examination.
A farmer lifts a sack of grain weighing \(150\) kg onto a platform \(1.2\) m high using a first‑class lever. The effort arm is \(0.8\) m and the load arm is \(0.2\) m. The farmer pushes on the effort arm at an angle of \(30^{\circ}\) below the horizontal.\n\n(i) Determine the magnitude of the force the farmer must apply (in newtons).\n(ii) If the effort end moves vertically through a distance of \(0.30\) m during the lift, calculate the work done by the farmer's muscles (in joules).\nAssume \(g=9.81\;\text{m s}^{-2}\) and neglect friction.
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About This Question
This is Gce Model Questions Vol1 2018 Agricultural Science Question 14. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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