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Engineering Mechanics

Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h × kG
h/kG
kG2/h
h2/kG

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Engineering Mechanics
One joule is equal to

0.1 N-m
10 N-m
100 N-m
1 N-m

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Engineering Mechanics
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be

Downwards at its upper end
Towards the wall at its upper end
Upwards at its upper end
Away from the wall at its upper end

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Engineering Mechanics
The moment of inertia of a square of side (a) about an axis through its center of gravity is

a4/8
a4/36
a4/12
a4/4

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Engineering Mechanics
The range of projectile (R) on an upward inclined plane is

g. cos² β/2u². sin (α + β). cos α
2u². sin (α + β). cos α/g. cos² β
2u². sin (α - β). cos α/g. cos² β
g. cos² β/2u². sin (α - β). cos α

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

Newton's second law of motion
Newton's third law of motion
Newton's first law of motion
None of these

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