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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.)

2n
n
n²
2n - 1

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

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

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Engineering Mechanics
When the spring of a watch is wound, it will possess

Heat energy
Electrical energy
Strain energy
Kinetic energy

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Engineering Mechanics
The maximum acceleration of a particle moving with simple harmonic motion is

ωr
ω
ω/r
ω²r

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

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.7 r
0.5 r
0.8 r
0.6 r

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MORE MCQ ON Engineering Mechanics

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