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Engineering Mechanics

Engineering Mechanics
A screw jack used for lifting the loads is

An ideal machine
None of these
A reversible machine
A non-reversible machine

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

All of these
Be completely at rest
Move in any one direction rotating about itself
Rotate about itself without moving

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Engineering Mechanics
Center of gravity of a thin hollow cone lies on the axis at a height of

One-half of the total height above base
One-third 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
The maximum velocity of a particle moving with simple harmonic motion is

ω
ω2r
ωr
ω/r

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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 rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

1 m
4 m
3 m
2 m

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