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Engineering Mechanics

Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ωr
ω
ω/r
ω²r

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

Mechanical advantage to the velocity ratio
Work done by the machine to the work done on the machine
All of these
Output to the input

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

60° + β/2
45° + β/2
β/2
30° + β/2

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

Two times
Six times
Nine times
Four times

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Engineering Mechanics
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

None of these
Equal to
Greater than
Less than

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Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

2mr²/5
2mr²/3
mr²/3
3mr²/5

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