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Engineering Mechanics

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

Inelastic
None of these
Solid
Elastic

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Engineering Mechanics
The motion of a particle round a fixed axis is

Rotary
Translatory
Circular
Translatory as well as rotary

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Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd3/32
πd4/64
πd3/16
πd4/32

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 + sinφ)/(1 - sinφ)
(1 + tanφ)/(1 - tanφ)
(1 - tanφ)/(1 + tanφ)
(1 - sinφ)/(1 + sinφ)

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Engineering Mechanics
The coefficient of friction depends upon

Shape of the surfaces
Nature of surfaces
Area of contact
All of these

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Engineering Mechanics
The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion, and y = Displacement of the particle from mean position.)

ω.√(y² - r²)
ω.√(r² - y²)
ω².√(r² - y²)
ω².√(y² - r²)

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