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Engineering Mechanics

Engineering Mechanics
For a self locking machine, the efficiency must be

Equal to 50%
Less than 50%
1
Greater than 50%

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

Upward at its upper end
Downward at its upper end
Away from the wall at its upper end
Towards the wall at its upper end

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Engineering Mechanics
The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Like parallel forces
Coplanar concurrent forces
Coplanar non-concurrent forces
Unlike parallel forces

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Maximum
Zero
Minimum
Infinity

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Engineering Mechanics
The periodic time of a particle with simple harmonic motion is _________ proportional to the angular velocity.

None of these
Directly
Square root
Inversely

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Engineering Mechanics
The friction experienced by a body, when in motion, is known as

Dynamic friction
Static friction
Limiting friction
Rolling friction

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