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8. A lever of length 9 cm has its foad arm 5 em longand the effort arm is 9 em long. (a) To which classdoes it belong ? (b) Draw diagram of the lever showingthe position of fulcrum F and directions of boththe load L and effort E. (c) What is the mechanicaladvantage and velocity ratio if the efficiency is100%? (d) what will be the mechanical advantageand velocity ratio if the efficiency becomes 50% ?

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