A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine?
- 60%
-
50%
- 40%
- 2%
The correct answer is: B
Explanation
Efficiency = (M.A)/V.R X (100)/1But M.A = (Load)/Effort = (1600)/800 = 2
Efficiency = (2)/4 x (100)/1 = 50%