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Engineering Mechanics

Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω2/y
ω2.y
ω.y
ω3.y

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Engineering Mechanics
The impact between two lead spheres is approximately equal to an __________ impact.

None of these
Solid
Elastic
Inelastic

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Engineering Mechanics
In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

P = W cos (α + φ)
P = W tan (α + φ)
P = W tan (α - φ)
P = W tan (φ - α)

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

-8.9 m/s2
+8.9 m/s2
-9.8 m/s2
+9.8 m/s2

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

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

Maximum
Minimum
Zero
None of these

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