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Engineering Mechanics

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

a²/8
a⁴/16
a⁴/12
a³/12

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Perpendicular to the wall at its upper end
Zero at its upper end
Downward at its upper end
Upward at its upper end

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Engineering Mechanics
Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Do not meet
Either ‘A’ or ‘B’
None of these
Meet

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

√(gh)
2g.√h
√(2gh)
2.√(gh)

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Neither reversible nor non-reversible machine
Ideal machine
Non-reversible machine
Reversible machine

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Engineering Mechanics
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

Principle of resolution of forces
Principle of independence of forces
None of these
Principle of transmissibility of forces

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