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Engineering Mechanics

Engineering Mechanics
A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

Greater than
Equal to
Less than
Either (B) or (C)

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Engineering Mechanics
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

Limiting friction
Dynamic friction
Coefficient of friction
Static friction

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Engineering Mechanics
The friction experienced by a body, when at rest, is known as

Limiting friction
Dynamic friction
Coefficient of friction
Static friction

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Engineering Mechanics
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

(1/2π). √(g/l)
(1/2π). √(l/g)
2π. √(l/g)
None of these

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α - φ)/tanα
None of these
tan(α + φ)/tanα
tanα/tan (α + φ)

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

None of these
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion

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