Question

a block and tackle system with 4pulleys has the load rising at a uniform speed. The load is mass of 24kg.The effort is applied by a mass of 1kg hanging at the free end of the load. calculate the VR​

Answer 1

Answer:

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%