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Engineering Mechanics

Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Non-reversible
Ideal
None of these
Reversible

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Engineering Mechanics
The units of moment of inertia of mass are

m²/kg
kg-m²
kg/m²
kg/m

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

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/8
bh3/12
bh3/4
bh3/36

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Engineering Mechanics
Which of the following are vector quantities?

Linear displacement
Linear acceleration
Linear velocity
All of these

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Engineering Mechanics
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

None of these
g/4
g/2
g/3

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