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Engineering Mechanics

Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

n
2n - 1
2n
n²

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Engineering Mechanics
The velocity ratio of a first system of pulleys with 4 pulleys is

4
16
8
20

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Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

16 cm4
20 cm4
12 cm4
9 cm4

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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
Iω2
0.5 Iω
Iω

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N
20 N
120 N
None of the listed here

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Engineering Mechanics
The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Non-coplanar non-concurrent forces
Coplanar concurrent forces
Non-coplanar concurrent forces
Coplanar non-concurrent forces

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