Question

fixed pulley used to lift a load 350N by applying an effort of 450N. Calculate the efficiency of the pulley.​

Answer 1

Step-by-step explanation:

Correct option is

B

90%

As we know that efficiency (η) =

velocity ratio

mechanical advantage

Mechanical Advantage(M.A) =

effort

load

=

1000

4500

= 4.5

Velocity Ratio(V.R) = No. of pulleys used = 5

Therefore efficiency η =

5

4.5

×100% = 90%