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Engineering Mechanics

Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Momentum
Mass
Weight
Impulsive force

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Engineering Mechanics
Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

20 N and 5 N
15 N and 5 N
15 N and 15 N
None of these

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

All of these
Increasing the number of teeth of the pinion
Increasing the length of the handle
Increasing the radius of the load drum

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

√(gh)
√(2gh)
2.√(gh)
2g.√h

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Engineering Mechanics
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

Greater than
Less than
None of these
Equal to

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Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG / Ah2
IP = IG - Ah2
IP = Ah2 / IG
IP = IG + Ah2

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