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Engineering Mechanics

Engineering Mechanics
The rate of doing work is known as

Potential energy
Power
None of these
Kinetic energy

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Engineering Mechanics
The range of projectile (R) on an upward inclined plane is

g. cos² β/2u². sin (α + β). cos α
2u². sin (α - β). cos α/g. cos² β
2u². sin (α + β). cos α/g. cos² β
g. cos² β/2u². sin (α - β). cos α

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Engineering Mechanics
The law of motion involved in the recoil of gun is

None of these
Newton's first law of motion
Newton's third law of motion
Newton's second law of motion

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

60° + β/2
30° + β/2
β/2
45° + β/2

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Engineering Mechanics
One joule is equal to

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

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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 depth (d), is

bd³/12
bd³/36
db³/12
db³/36

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