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Engineering Mechanics

Engineering Mechanics
The total motion possessed by a body, is called

Mass
Impulsive force
Momentum
Weight

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

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

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Engineering Mechanics
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = g cos β/2u sin (α - β)
t = 2u sin (α - β)/g cos β
t = 2u sin (α + β)/g cos β
t = g cos β/2u sin (α + β)

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

g tanθ
None of these
g cosθ
g sinθ

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Engineering Mechanics
In actual machines, mechanical advantage is _________ velocity ratio.

Equal to
Greater than
Less than
None of these

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

2π. √(kG² + h²/gh)
1/2π. √(gh/kG² + h²)
1/2π. √(kG² + h²/gh)
2π. √(gh/kG² + h²)

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