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Engineering Mechanics

Engineering Mechanics
A pendulum which executes one beat per second is known as

Torsional pendulum
Second's pendulum
Compound pendulum
Simple pendulum

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]
(∑V)2 + (∑H)2
√[(∑V)2 + (∑H)2]
(∑V)2 +(∑H)2 +2(∑V)(∑H)

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/180
πN/60
πN/180
2πN/60

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

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Engineering Mechanics
The rate of change of displacement of a body is called

Velocity
Acceleration
Momentum
None of these

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Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h × kG
h2/kG
h/kG
kG2/h

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MORE MCQ ON Engineering Mechanics

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