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Engineering Mechanics

Engineering Mechanics
The velocity of a particle moving with simple harmonic motion is _________ at the mean position.

Minimum
None of these
Zero
Maximum

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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 = IG / Ah2
IP = IG - Ah2
IP = Ah2 / IG

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Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Non-coplanar concurrent forces
Coplanar non-concurrent forces
Coplanar concurrent forces
None of these

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Engineering Mechanics
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

1.0 cm
0.5 cm
2.5 cm
1.5 cm

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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
a = α/ r
None of these

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

50 mm
125 mm
75 mm
87.5 mm

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