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Engineering Mechanics

Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cotθ/2
2P sinθ/2
2P cosθ/2
2P tanθ/2

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α - φ)/tanα
tan(α + φ)/tanα
tanα/tan (α + φ)
None of these

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/3
3L/4
2L/3
L/2

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Engineering Mechanics
The impact between two lead spheres is approximately equal to an __________ impact.

None of these
Elastic
Solid
Inelastic

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Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center 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 = Ah2 / IG
IP = IG - Ah2
IP = IG + Ah2

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Engineering Mechanics
Moment of inertia is the

Second moment of force
All of these
Second moment of mass
Second moment of area

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MORE MCQ ON Engineering Mechanics

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