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Engineering Mechanics

Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

None of these
Resolution
Composition
Decomposition

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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

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

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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
3r/ 8
4r/ 3π

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Engineering Mechanics
Centre of gravity of a solid cone lies on the axis at the height

One third of the total height above base
One fourth of the total height above base
One-half of the total height above base
Three eighth of the total height above the base

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Increase
None of these
Decrease
Not be effected

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/180
πN/180
2πN/60
πN/60

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