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Engineering Mechanics

Engineering Mechanics
If n = number of members and y = number of joints, then for a perfect frame, n = ?

43864
43832
43892
43865

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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.

Not be effected
Decrease
Increase
None of these

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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

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

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Engineering Mechanics
A couple produces

Combined translatory and rotational motion
Rotational motion
Translatory motion
None of these

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

bd³/36
db³/12
bd³/12
db³/36

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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 (cosα + μsinα)
P = W tanα
P = W (sinα + μcosα)

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