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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%.​

Respuesta :

Sueraiuka

Explanation:

Hey there!!

Here, Given is,

Efficiency = 75%

VR = no. of pulleys = 5

Now,

[tex]effeciency = (\frac{ma}{vr} ) \times 100\%[/tex]

[tex]75\% = \frac{ma}{5} \times 100\% [/tex]

100% ma = 75%×5

[tex]ma = \frac{75\% \times5}{100\%} [/tex]

[tex]ma = \frac{375\%}{100\%} [/tex]

Therefore, MA is 3.75.

Hope it helps...

kritika9813

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