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Engineering Mechanics

Engineering Mechanics
The unit of work in S.I. units is

Newton
kg-m
joule
erg

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

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

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Engineering Mechanics
The velocity ratio in case of an inclined plane inclined at angle 'θ' to the horizontal and weight being pulled up the inclined plane by vertical effort is

cosecθ
cosθ
sinθ
tanθ

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Engineering Mechanics
The friction experienced by a body, when in motion, is known as

Static friction
Dynamic friction
Limiting friction
Rolling friction

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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
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

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P - m.a = 0
P/m.a = 0
P + m.a = 0
P × m.a = 0

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