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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

a³/12
a²/8
a⁴/16
a⁴/12

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

All of these
The bottom surface
The midpoint of its axis
The centre of heavy portion

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Engineering Mechanics
In ideal machines, mechanical advantage is __________ velocity ratio.

None of these
Greater than
Equal to
Less than

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

ω2/y
ω.y
ω3.y
ω2.y

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

Iω2
0.5 Iω
0.5 Iω2
Iω

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Engineering Mechanics
Work done is said to be zero, when

No force acts on a body but some displacement takes place
None of these
Some force acts on a body, but displacement is zero
Either (A) or (B)

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