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Engineering Mechanics

Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

8r/3
4r/ 3π
3r/ 8
3r/4π

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Engineering Mechanics
The units of moment of inertia of mass are

kg/m²
m²/kg
kg/m
kg-m²

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Engineering Mechanics
The bodies which rebound after impact are called

Elastic bodies
Neither elastic nor inelastic bodies
None of these
Inelastic bodies

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

ω3.y
ω.y
ω2.y
ω2/y

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

-8.9 m/s2
+8.9 m/s2
+9.8 m/s2
-9.8 m/s2

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

bd³/12
bd³/36
db³/36
db³/12

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