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Engineering Mechanics

Engineering Mechanics
In ideal machines, mechanical advantage is __________ velocity ratio.

Less than
Greater than
None of these
Equal to

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

2.√(gh)
√(2gh)
√(gh)
2g.√h

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Engineering Mechanics
The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Coplanar non-concurrent forces
Non-coplanar concurrent forces
Coplanar concurrent forces
Non-coplanar non-concurrent forces

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Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Mass
Impulsive force
Momentum
Weight

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

Distance moved by effort to the distance moved by load
Output to the input
All of these
Load lifted to the effort applied

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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

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

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