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Engineering Mechanics

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

Maximum
Zero
None of these
Minimum

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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.)

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

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Engineering Mechanics
The energy possessed by a body, for doing work by virtue of its position, is called

Kinetic energy
Electrical energy
Potential energy
Chemical energy

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Engineering Mechanics
A screw jack used for lifting the loads is

A reversible machine
None of these
An ideal machine
A non-reversible machine

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Engineering Mechanics
The point, through which the whole weight of the body acts, irrespective of its position, is known as

Center of gravity
Center of mass
Moment of inertia
Center of percussion

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

2g
√2.g
g
g/2

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