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Engineering Mechanics

Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

3r/4π
8r/3
4r/ 3π
3r/ 8

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Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

2mr²/3
2mr²/5
7mr²/3
7mr²/5

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

All of these
Distance moved by effort to the distance moved by load
Output to the input
Load lifted to the effort applied

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(u₂ + u₁)/(v₂ + v₁)
(v₁ - v₂)/(u₁ - u₂)
(u₁ - u₂)/(v₁ - v₂)
(v₂ - v₁)/(u₁ - u₂)

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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

Static friction
Limiting friction
Dynamic friction
Coefficient of friction

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Engineering Mechanics
The angle between two forces when the resultant is maximum and minimum respectively are

90° and 0°
90° and 180°
180° and 0°
0° and 180°

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MORE MCQ ON Engineering Mechanics

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