Question

A machine with velocity ratio of 5 requires 1000j or work to raise a load of 500N through a vertical distance of 1.5m.Find the efficiency and M.A of the machine​

Answer 1

Efficiency = 75%

M.A = 1500

Step-by-step explanation:

Efficiency is given by the formula;

E = (work output/work input) × 100%

Work output = 500 × 1.5 = 750 J

We are given the work input as 1000 J.

Thus;

Efficiency = (750/1000) × 100% = 75%

Now, to find the mechanical advantage;

Efficiency = (M.A/V.R) × 100

75 = (M.A/5) × 100

M.A = 100 × 75/5

M.A = 1500