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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D + d
D × d
D - d
D / d

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Engineering Mechanics
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

Greater than
Less than
Equal to
None of these

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Engineering Mechanics
One joule is equal to

100 N-m
0.1 N-m
10 N-m
1 N-m

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

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

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (cosα + μsinα)
P = W tanα
P = W (sinα + μcosα)
P = W tan (α + φ)

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Engineering Mechanics
The velocity of a particle moving with simple harmonic motion is _________ at the mean position.

Minimum
Zero
Maximum
None of these

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