Question

>> A pulley system has velocity ratio 3 and an efficiency of 80%. Calculate:
i) Mechanical advantage ii) the effort required to raise a load of 600 N.

Answer 1

Answer:

A pulley system has a velocity ratio =3

Efficiency of system =80%=0.8

Mechanical advantage of the system M.A=V.A×η=3×0.8=2.4

Effort required to raise the load = Efforts 600/2.4

is 250N

Answer 2

GIVEN:-

• A pulley system has a velocity f 3

• Efficiency=80 %

TO FIND:-

1. Mechanical Advantage
2. The effort required to raise a load of 600 N

EXPLANATION:-

(i)We know:-

$\boxed{\sf\underline{Mechanical\;advantange=Effieciency\times Veloicty\; ratio}}$

Velocity ration=3 (given)

Velocity ration=80/100

Velocity ratio=0.8

So let's put the given data in the formula to get Mechanical advantage,

Mechanical advantage=3×0.8

Mechanical advantage=2.4

So the mechanical advantage is 2.4

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(ii)We know that,

$\boxed{\sf\underline{Effort=\frac{Load}{Mechanical\;energy}}}$

Load=600 N (given)

Mechanical energy=2.4   (calculated above)

So let's put the give data to calculate Effore,

$\sf\;Effort=\frac{600}{2.4}\\\\Effore=\frac{600}{24}\times 10\\\\Effort=\frac{6000}{24}\\\\Effort=250\;N$

So the effort required to raise a load of 600 N is 250 N

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