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Engineering Mechanics

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

Zero
Infinity
Maximum
Minimum

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² sin²α/g
u² sin²α/2g
u² cos²α/g
u² cos²α/2g

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (sinα + μcosα)
P = W tan (α + φ)
P = W (cosα + μsinα)
P = W tanα

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Engineering Mechanics
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Upwards at its upper end
Zero at its upper end
Downwards at its upper end
Perpendicular to the wall at its upper end

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Engineering Mechanics
The ratio of static friction to dynamic friction is always

Less than one
Greater than one
Equal to one
None of these

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Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

None of these
Resolution
Composition
Decomposition

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MORE MCQ ON Engineering Mechanics

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