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Engineering Mechanics

Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

None of these
More than
Less than
Equal to

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

75 mm
50 mm
125 mm
87.5 mm

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Zero
Infinity
Maximum
Minimum

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Engineering Mechanics
The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is

a = α.r
a = r / α
None of these
a = α/ r

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Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ω
ω²r
ωr
ω/r

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

bh3/36
bh3/4
bh3/12
bh3/8

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