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Engineering Mechanics

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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Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Less than
Equal to
More than
None of these

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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
Area of the triangle
Half the area of the triangle
Twice the area of the triangle

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Engineering Mechanics
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

100 N
500 N
20 N
None of these

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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
Not be effected
None of these
Decrease

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Engineering Mechanics
Mass moment of inertia of a thin rod about its one end is ___________ the mass moment of inertia of the same rod about its mid-point

Twice
Four times
Thrice
Same as

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