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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

2mr²/3
7mr²/3
2mr²/5
7mr²/5

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

√(gh)
2.√(gh)
√(2gh)
2g.√h

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Engineering Mechanics
A machine having an efficiency less than 50%, is known as

Reversible machine
Neither reversible nor non-reversible machine
Non-reversible machine
Ideal machine

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Engineering Mechanics
The unit of moment of inertia of an area is

kg-m2
kg/m2
m4
kg-m-s2

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

Second's pendulum
Compound pendulum
Torsional pendulum
Simple pendulum

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 + tanφ)/(1 - tanφ)
(1 - tanφ)/(1 + tanφ)
(1 + sinφ)/(1 - sinφ)
(1 - sinφ)/(1 + sinφ)

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