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Engineering Mechanics

Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

None of these
Less than
More than
Equal to

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

0.5 Iω2
0.5 Iω
Iω
Iω2

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Engineering Mechanics
The unit of force in S.I. system of units is

Kilogram
Watt
Dyne
Newton

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Engineering Mechanics
For a self locking machine, the efficiency must be

1
Equal to 50%
Greater than 50%
Less than 50%

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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
Moment of inertia is the

Second moment of area
Second moment of force
All of these
Second moment of mass

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MORE MCQ ON Engineering Mechanics

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