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%.​

Answer 1

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

Answer 2

Step-by-step explanation:

Hey there!!

Here, Given is,

Efficiency = 75%

VR = no. of pulleys = 5

Now,

`effeciency = ((ma)/(vr) ) * 100\%`

`75\% = (ma)/(5) * 100\%`

100% ma = 75%×5

`ma = (75\% *5)/(100\%)`

`ma = (375\%)/(100\%)`

Therefore, MA is 3.75.

Hope it helps...