Machines A pulley system having 5 pulleys is used to raise a 450 N load. Find the Mechanical advantage and hence the effort i

Question

Machines
A pulley system having 5 pulleys is used to
raise a 450 N load. Find the Mechanical
advantage and hence the effort if the
efficiency is 75%.​

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Thành Công 5 years 2021-07-29T06:17:38+00:00 2 Answers 205 views 1

Answers ( )

  1. thienthanh
    0
    2021-07-29T06:19:12+00:00
    Reply

    Answer:

    MA=3.75

    Explanation:Given that, E=75%, VR=no. of pulley=5

    NOW,

    E=(MA/VR)*100%

    75%=(MA/5)*100%

    MA=(75%*5)*100%

    MA=375%/100%

    ∵MA=3.75

  2. Doris
    0
    2021-07-29T06:19:18+00:00
    Reply

    Explanation:

    Hey there!!

    Here, Given is,

    Efficiency = 75%

    VR = no. of pulleys = 5

    Now,

    effeciency = (\frac{ma}{vr} ) \times 100\%

    75\% = \frac{ma}{5} \times 100\%

    100% ma = 75%×5

    ma = \frac{75\% \times5}{100\%}

    ma = \frac{375\%}{100\%}

    Therefore, MA is 3.75.

    Hope it helps...

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