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Engineering Mechanics

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

mr²/3
3mr²/5
2mr²/3
2mr²/5

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Engineering Mechanics
The C.G. of a solid hemisphere lies on the central radius 3r

At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

(p² - q²)/4
(p² + q²)/4
[√(4p² - q²)]/6
(4p² - q²)/6

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Engineering Mechanics
The velocity of a particle moving with simple harmonic motion is _________ at the mean position.

Minimum
None of these
Zero
Maximum

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

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

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Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd4/64
πd3/16
πd4/32
πd3/32

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