A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N calculate its mechanical advantage?
A
0.7
B
0.9
C
1.5
D
2.5
E
10.0
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Mechanical Advantage = \(\frac{Load}{Effort}\) but Load = 30N and Effort = 20N
M . A = \(\frac{30}{20}\) = 1.5
Source: Myschool Past Questions Archive (Record #25061)