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Engineering Mechanics

Engineering Mechanics
The slope on the road surface generally provided on the curves is known as

Angle of repose
Angle of friction
Angle of banking
None of these

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 - tanφ)/(1 + tanφ)
(1 + sinφ)/(1 - sinφ)
(1 + tanφ)/(1 - tanφ)
(1 - sinφ)/(1 + sinφ)

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Engineering Mechanics
In order to double the period of simple pendulum, the length of the string should be

None of these
Quadrupled
Doubled
Halved

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

ωr
ω2r
ω/r
ω

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N
None of the listed here
120 N
20 N

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

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