ENGINEERING MECHANICS QUIZ

The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Non-coplanar concurrent forces

Intersecting forces

Non-coplanar non-concurrent forces

Coplanar non-concurrent forces

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On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Perpendicular to the wall at its upper end

Zero at its upper end

Upwards at its upper end

Downwards at its upper end

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The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω2.y

ω2/y

ω.y

ω3.y

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Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/12

bh3/36

bh3/4

bh3/8

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The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

87.5 mm

125 mm

75 mm

50 mm

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The term 'Centroid' is

None of the listed here

The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

The same as centre of gravity

The point of suspension

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The slope on the road surface generally provided on the curves is known as

Angle of banking

Angle of repose

None of these

Angle of friction

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The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/2

mr²/6

mr²/8

mr²/4

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The unit of angular velocity is

rad/s

Both (B) and (C)

Revolutions/min

m/min

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The acceleration of a body sliding down an inclined surface is

g sinθ

g tanθ

None of these

g cosθ

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