Question

1. A single fixed pulley is used to raise a load of 27 N from the ground to the first floor of a building. The efficiency of the system is found to be 90%. Calculate : (a) the mechanical advantage, (b) the effort applied, and (c) the frictional force experienced.​

Answer 1

A N S W E R :

0.9

E X P L A N A T I O N :

for the single fixed pulley the value of V.R= 1

M.A = efficiency * V.R

M.A= efficiency ( since V.R =1)

= 90/100

= 0.9

Answer 2

The frictional force experienced the 0.9.

Explanation:

For the single fixed pulley the value of $V.R=1$

$M.A=effiienccy*V.R$

$V.R=1$

$M.A=efficiency$

$=\frac{90}{900}$

$=0.9$