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Engineering Mechanics

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/2
g/3
g/4

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

Be completely at rest
Rotate about itself without moving
Move in any one direction rotating about itself
All of these

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is minimum in the start and maximum at the end
Varies from point to point
Is maximum in the start and minimum at the end
Is constant at every instant

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

All of these
The centre of heavy portion
The midpoint of its axis
The bottom surface

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

ω/2π
2π/ω
π/ω
2π × ω

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

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

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