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Engineering Mechanics

Engineering Mechanics
The velocity of a particle moving with simple harmonic motion is _________ at the mean position.

Maximum
Zero
Minimum
None of these

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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
Minimum
Infinity
Zero

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Engineering Mechanics
The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

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

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

2n - 1
n²
n
2n

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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

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

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Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D + d
D × d
D / d
D - d

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