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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/8
mr²/4
mr²/6
mr²/2

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

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

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

Q = 2R
Q = R
None of the listed here
P = Q

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

[√(4p² - q²)]/6
(p² - q²)/4
(p² + q²)/4
(4p² - q²)/6

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Engineering Mechanics
When the spring of a watch is wound, it will possess

Electrical energy
Kinetic energy
Strain energy
Heat energy

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

Coplanar non-concurrent forces
Intersecting forces
Non-coplanar concurrent forces
Non-coplanar non-concurrent forces

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