Mechanical Engineering - Engineering Mechanics

31.
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
IP = IG + Ah2
IP = IG - Ah2
IP = IG / Ah2
IP = Ah2 / IG
Answer: Option
Explanation:
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32.
The resultant of two equal forces P making an angle θ, is given by
2 P sin θ /2
2 P cos θ /2
2 P tan θ /2
2 P cot θ /2
Answer: Option
Explanation:
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33.
The force, by which the body is attracted, towards the centre of the earth, is called
impulsive force
mass
weight
momentum
Answer: Option
Explanation:
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34.
Coplaner concurrent forces are those forces which
meet at one point, but their lines of action do not lie on the same plane
do not meet at one point and their lines of action do not lie on the same plane
meet at one point and their lines of action also lie on the same plane
do not meet at one point, but their lines of action lie on the same plane
Answer: Option
Explanation:
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35.
The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ω radian/s is given by
T.ω (in watts)
T.ω/60 (in watts)
T.ω/75 (in kilowatts)
T.ω/4500 (in kilowatts)
Answer: Option
Explanation:
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