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Engineering Mechanics

Engineering Mechanics
An ideal machine is one whose efficiency is

Between 70 and 80%
1
Between 60 and 70 %
Between 80 and 90%

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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 Iω
Iω2
0.5 Iω2
Iω

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Engineering Mechanics
The law of motion involved in the recoil of gun is

None of these
Newton's second law of motion
Newton's first law of motion
Newton's third law of motion

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

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

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Engineering Mechanics
The slope on the road surface generally provided on the curves is known as

Angle of friction
Angle of banking
None of these
Angle of repose

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Engineering Mechanics
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/2
mr²/8
mr²/6
mr²/4

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