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Engineering Mechanics

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

Resolution
Decomposition
Composition
None of these

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

2.5 cm
3.0 cm
5.0 cm
4.0 cm

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

db³/12
bd³/12
bd³/36
db³/36

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Engineering Mechanics
A couple produces

Translatory motion
Rotational motion
None of these
Combined translatory and rotational motion

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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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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. cosα/g
t = 2u/g.sinα
t = 2u. tanα/g
t = 2u. sinα/g

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