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Engineering Mechanics

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

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

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P/m.a = 0
P × m.a = 0
P - m.a = 0
P + m.a = 0

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Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

m
1 + m
1 - m
1 / m

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/6
mr²/8
mr²/4
mr²/2

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Engineering Mechanics
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Zero at its upper end
Downward at its upper end
Upward at its upper end
Perpendicular to the wall at its upper end

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

ω²r
ω
ωr
ω/r

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