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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D + d)
D/(D - d)
2D/(D + d)
2D/(D - d)

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

Iω
Iω2
0.5 Iω
0.5 Iω2

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Engineering Mechanics
The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be

2r/3
r/2
r/A
3r/2

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² sin²α/2g
u² cos²α/2g
u² cos²α/g
u² sin²α/g

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Engineering Mechanics
The point, through which the whole weight of the body acts, irrespective of its position, is known as

Center of percussion
Center of gravity
Center of mass
Moment of inertia

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Engineering Mechanics
If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that

tanθ = ΣH/ΣV
tanθ = ΣV/ΣH
tanθ = √(ΣV + ΣH)
tanθ = ΣV × ΣH

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