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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/36
bh3/8
bh3/12
bh3/4

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α + φ)/tanα
None of these
tanα/tan (α + φ)
tan(α - φ)/tanα

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Engineering Mechanics
The friction experienced by a body, when at rest, is known as

Static friction
Limiting friction
Dynamic friction
Coefficient of friction

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Engineering Mechanics
The angle between two forces when the resultant is maximum and minimum respectively are

90° and 180°
0° and 180°
90° and 0°
180° and 0°

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Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

20
10
40
5

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Engineering Mechanics
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

v = u + a.t
s = u.t + ½ a.t2
All of these
v2 = u2 + 2a.s

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