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Engineering Mechanics

Engineering Mechanics
The impact between two lead spheres is approximately equal to an __________ impact.

Inelastic
Elastic
None of these
Solid

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

4.0 cm
3.0 cm
2.5 cm
5.0 cm

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Engineering Mechanics
The coefficient of restitution for inelastic bodies is

One
More than one
Between zero and one
Zero

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Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd3/32
πd3/16
πd4/32
πd4/64

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(v₁ - v₂)/(u₁ - u₂)
(v₂ - v₁)/(u₁ - u₂)
(u₁ - u₂)/(v₁ - v₂)
(u₂ + u₁)/(v₂ + v₁)

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Engineering Mechanics
A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

Greater than
Less than
Equal to
Either (B) or (C)

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