Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 2 (Q.No. 10)
10.
The maximum efficiency of a lifting machine is
Discussion:
16 comments Page 2 of 2.
Harsh said:
9 years ago
What is m here?
YOGENDRA SINGH said:
1 decade ago
MA = W/P,
From law of machine.
P = mW+C.
MA = 1/(m+C/W).
So in limiting case when W tends to infinity, then C/W = 0 and max mechanical advantage equals to 1/m.
So efficiency = MA/VR.
Max efficiency = 1/m*VR.
From law of machine.
P = mW+C.
MA = 1/(m+C/W).
So in limiting case when W tends to infinity, then C/W = 0 and max mechanical advantage equals to 1/m.
So efficiency = MA/VR.
Max efficiency = 1/m*VR.
Krishna said:
1 decade ago
Efficieny = MA/VR.
If MA is Max then Eff is Max.
MA is Max when MA = 1/m we get MA = 1/m from law of machine P = mW+c.
Since MA = W/p and substituting P from law of machine we get MA max = 1/m.
So Eff = 1/m*VR.
If MA is Max then Eff is Max.
MA is Max when MA = 1/m we get MA = 1/m from law of machine P = mW+c.
Since MA = W/p and substituting P from law of machine we get MA max = 1/m.
So Eff = 1/m*VR.
Sanjay said:
1 decade ago
M means Mechanical advance and VR means Velocity Ratio.
Naveen K said:
1 decade ago
Please mention what these M, V, R indicates?
Robo said:
1 decade ago
If someone knows the explanation for this question please explain here.
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