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Engineering Mechanics

Engineering Mechanics
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of

r/2
r/A
0.134 r
r/3

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Engineering Mechanics
The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)

P = mW + C
P = mW - C
P = m/W + C
P = C - mW

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Engineering Mechanics
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

1 m
3 m
4 m
2 m

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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.)

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

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Engineering Mechanics
The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Coplanar non-concurrent forces
Like parallel forces
Coplanar concurrent forces
Unlike parallel forces

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Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² sinα/g
R = u² sin2α/g
R = u² cos2α/g
R = u² cosα/g

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