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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a square of side (a) about an axis through its center of gravity is

a4/12
a4/36
a4/8
a4/4

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Engineering Mechanics
The unit of work in S.I. units is

joule
Newton
kg-m
erg

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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

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

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Engineering Mechanics
A redundant frame is also called __________ frame.

None of these
Deficient
Perfect
Imperfect

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

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

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. tanα/g
t = 2u. sinα/g
t = 2u/g.sinα
t = 2u. cosα/g

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