Question

A system of 5 pulleys is arranged to form a block and tackle set up. An effort applied to this system is used to raise the load through 60 cm. Find the

value of the distance over which the effort has moved.​

Answer 1

Explanation:

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%