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Engineering Mechanics

Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² sin2α/g
R = u² cos2α/g
R = u² cosα/g
R = u² sinα/g

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Engineering Mechanics
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

None of these
Half the area of the triangle
Area of the triangle
Twice the area of the triangle

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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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Engineering Mechanics
The centre of gravity of a right circular solid cone is at a distance of _________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

h/6
h/4
h/2
h/3

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Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

4mr²/5
2mr²/5
3mr²/10
3mr²/5

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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 C.G. and parallel to the base, is

bh3/8
bh3/12
bh3/4
bh3/36

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