A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%, determine its mechanical advantages
A
12.0
B
10.0
C
3.6
D
1.8
Verified Correct Answer: C.
Physical Principles & Numerical Solution
M.A = \(\frac{Z \times V.R}{100}\)
= \(\frac{60 \times 6}{100}\) = 3.6
Source: Myschool Past Questions Archive (Record #34019)