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Engineering Mechanics

Engineering Mechanics
The coefficient of restitution for inelastic bodies is

Zero
More than one
Between zero and one
One

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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
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

5.0 cm
2.5 cm
3.0 cm
4.0 cm

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Engineering Mechanics
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω².r
ω/r
ω.r
ω²/r

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

Dynamic friction
Coefficient of friction
Limiting friction
Static friction

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

(∑V)2 +(∑H)2 +2(∑V)(∑H)
√[(∑V)2 + (∑H)2]
(∑V)2 + (∑H)2
√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]

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