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Engineering Mechanics

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 / m
1 + m
m
1 - m

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Engineering Mechanics
The maximum efficiency of a lifting machine is

m/V.R.
1/(m × V.R.)
1/m
V.R./m

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

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Engineering Mechanics
Centre of gravity of a solid cone lies on the axis at the height

One third of the total height above base
One-half of the total height above base
One fourth of the total height above base
Three eighth of the total height above the base

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

None of these
Body has kinetic energy of translation
Work is said to be done
Power is being transmitted

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

Equal to
Greater than
None of these
Less than

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MORE MCQ ON Engineering Mechanics

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