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Mechanical Engineering - Engineering Mechanics - Discussion

Discussion Forum : Engineering Mechanics - Section 5 (Q.No. 5)
Engineering Mechanics
5.
Which of the following statement is incorrect?
A force acting in the opposite direction to the motion of the body is called force of friction.
The ratio of the limiting friction to the normal reaction is called coefficient of friction.
A machine whose efficiency is 100% is known as an ideal machine.
The velocity ratio of a machine is the ratio of load lifted to the effort applied.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.
Ujjawal aggarwal said:   7 years ago
The correct answer is A.
Sandy said:   9 years ago
It's mechanical Advantage.
(1)
Gautam jha said:   1 decade ago
Velocity ratio is the ratio of distance moved by effort to the distance moved by load.

i.e. V.R = y/x.

And its value should be in pure number.
(1)
Joel Kumar said:   1 decade ago
Mechanical Advantage (M.A) is the ratio of load lifted to the effort applied.
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