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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/ 8
8r/3
3r/4π
4r/ 3π

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P tanθ/2
2P cosθ/2
2P sinθ/2
2P cotθ/2

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

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

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Engineering Mechanics
The coefficient of restitution for inelastic bodies is

Zero
More than one
One
Between zero and one

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Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

2mr²/3
2mr²/5
mr²
mr²/2

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

50 mm
75 mm
125 mm
87.5 mm

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