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Engineering Mechanics

Engineering Mechanics
A pendulum which executes one beat per second is known as

Simple pendulum
Second's pendulum
Compound pendulum
Torsional pendulum

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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.

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

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Engineering Mechanics
A screw jack used for lifting the loads is

An ideal machine
None of these
A non-reversible machine
A reversible machine

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

2π. √(kG² + h²/gh)
2π. √(gh/kG² + h²)
1/2π. √(gh/kG² + h²)
1/2π. √(kG² + h²/gh)

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Engineering Mechanics
The velocity ratio in case of an inclined plane inclined at angle 'θ' to the horizontal and weight being pulled up the inclined plane by vertical effort is

sinθ
cosθ
cosecθ
tanθ

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

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