Question

Simple machine: If load distance=0.15 m Effort distance=0.3 m Find: 1.work done by load, 2. work done by effort, 3.M.A, 4. V.R 5.efficiency.

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%