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Engineering Mechanics

Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

Resolution
Decomposition
Composition
None of these

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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

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

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

4.0 cm
2.5 cm
5.0 cm
3.0 cm

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Engineering Mechanics
The friction experienced by a body, when in motion, is known as

Dynamic friction
Limiting friction
Rolling friction
Static friction

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

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Engineering Mechanics
A particle moves along a straight line such that distance (x) traversed in 't' seconds is given by x = t² (t - 4), the acceleration of the particle will be given by the equation

6f - 8
3t² + 2t
6t² - 8t
6f - 4

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