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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
A smooth cylinder lying on its convex surface remains in __________ equilibrium.

None of these
Unstable
Neutral
Stable

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/180
πN/60
2πN/60
πN/180

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.5 r
0.7 r
0.8 r
0.6 r

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

2π × ω
ω/2π
2π/ω
π/ω

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Zero at its upper end
Perpendicular to the wall at its upper end
Downward at its upper end
Upward at its upper end

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