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Engineering Mechanics

Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cosθ/2
2P cotθ/2
2P tanθ/2
2P sinθ/2

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

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

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Engineering Mechanics
The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Non-coplanar non-concurrent forces
Intersecting forces
Coplanar non-concurrent forces
Non-coplanar concurrent forces

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

n²
2n - 1
2n
n

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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

2 m
1 m
4 m
3 m

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Engineering Mechanics
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

g/2
None of these
g/3
g/4

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