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Engineering Mechanics

Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

First
Second
Third
None of these

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Engineering Mechanics
The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion, and y = Displacement of the particle from mean position.)

ω².√(r² - y²)
ω.√(y² - r²)
ω².√(y² - r²)
ω.√(r² - y²)

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

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

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

2g.√h
√(gh)
√(2gh)
2.√(gh)

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

None of these
Maximum
Zero
Minimum

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Engineering Mechanics
The angle between two forces when the resultant is maximum and minimum respectively are

180° and 0°
0° and 180°
90° and 0°
90° and 180°

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