In uplifting 750 newton load with the help of 2 meter long lever lever took 250 newton efforts . What will be the efficiency of a machine if

Question

In uplifting 750 newton load with the help of 2 meter long lever lever took 250 newton efforts . What will be the efficiency of a machine if the fulcrum is kept 50 cm from the load

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King 5 years 2021-07-14T11:25:30+00:00 1 Answers 90 views 1

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  1. Nho
    0
    2021-07-14T11:27:13+00:00
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    Answer:

    the efficiency of the machine is 100%

    Explanation:

    Given;

    load, L = 750 N

    length of the lever, L = 2 m

    effort applied, E = 250 N

    Position of the load from the fulcrum,  = 50 cm

                                         50cm

         0↓————————–Δ——————————-↓———200 cm

        750 N                                       x cm                 250 N

    Apply the principle of moment;

    750(50) = 250(x)

    x = (750 x 50) / (250)

    x = 150 cm

    the distance of the effort = 150 cm = 1.5 m

    the distance of the load = 50 cm = 0.5 m

    The velocity ratio of the machine = 1.5/0.5

                                                            = 3

    The mechanical advantage of the machine is calculated as;

    M.A = Load/effort

    M.A = 750 / 250

    M.A = 3

    The efficiency of the machine is calculated as;

    E = (M.A / V.R) x 100%

    E = (3/3) x 100% = 100%

    Therefore, the efficiency of the machine is 100%

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