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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

2mr²/3
mr²/2
2mr²/5
mr²

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Engineering Mechanics
A redundant frame is also called __________ frame.

Imperfect
Perfect
None of these
Deficient

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

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

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. cosα/g
t = 2u/g.sinα
t = 2u. sinα/g
t = 2u. tanα/g

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Engineering Mechanics
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Upwards at its upper end
Downwards at its upper end
Zero at its upper end
Perpendicular to the wall at its upper end

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Engineering Mechanics
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/6
mr²/8
mr²/2
mr²/4

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