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Engineering Mechanics

Engineering Mechanics
One kg force is equal to

9.8 N
12 N
7.8 N
8.9 N

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Engineering Mechanics
The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ √(gra/h)

None of these
Greater than
Equal to
Less than

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

3L/4
L/2
L/3
2L/3

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Engineering Mechanics
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

None of these
(1/2π). √(g/l)
(1/2π). √(l/g)
2π. √(l/g)

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Engineering Mechanics
In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

P = W tan (α - φ)
P = W tan (φ - α)
P = W tan (α + φ)
P = W cos (α + φ)

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Engineering Mechanics
When two elastic bodies collide with each other,

The two bodies tend to compress and deform at the surface of contact
The two bodies begin to regain their original shape
The two bodies will momentarily come to rest after collision
All of these

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