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Engineering Mechanics

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

None of these
Resolution
Decomposition
Composition

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

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

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

Static friction
Limiting friction
Rolling friction
Dynamic friction

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

None of these
Decrease
Increase
Not be effected

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Engineering Mechanics
The C.G. of a solid hemisphere lies on the central radius 3r

At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base
At distance — from the plane base 3r

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

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