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Engineering Mechanics

Engineering Mechanics
The rate of doing work is known as

Power
None of these
Potential energy
Kinetic energy

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

bd³/12
db³/36
bd³/36
db³/12

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Engineering Mechanics
For a self locking machine, the efficiency must be

Greater than 50%
Equal to 50%
Less than 50%
1

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Engineering Mechanics
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

Horizontal
Upwards
Downwards
None of these

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Engineering Mechanics
One joule is equal to

100 N-m
10 N-m
1 N-m
0.1 N-m

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

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

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