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Engineering Mechanics

Engineering Mechanics
If n = number of members and y = number of joints, then for a perfect frame, n = ?

43864
43892
43865
43832

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

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

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Engineering Mechanics
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = g cos β/2u sin (α + β)
t = 2u sin (α + β)/g cos β
t = g cos β/2u sin (α - β)
t = 2u sin (α - β)/g cos β

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Engineering Mechanics
The periodic time of a particle with simple harmonic motion is _________ proportional to the angular velocity.

Directly
Square root
Inversely
None of these

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Engineering Mechanics
The maximum velocity of a particle moving with simple harmonic motion is

ωr
ω/r
ω
ω2r

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Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Greater than
Less than
Equal to
None of these

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