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Engineering Mechanics

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

Simple pendulum
Torsional pendulum
Compound pendulum
Second's pendulum

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P sinθ/2
2P tanθ/2
2P cosθ/2
2P cotθ/2

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

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Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Less than
None of these
Greater than
Equal to

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

87.5 mm
50 mm
75 mm
125 mm

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² cos²α/g
u² sin²α/g
u² sin²α/2g
u² cos²α/2g

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