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Engineering Mechanics

Engineering Mechanics
When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is

mv2
0.5 mgv2
0.5 mv2
mgv2

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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 = IG + Ah2
IP = Ah2 / IG

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Engineering Mechanics
When two elastic bodies collide with each other,

The two bodies tend to compress and deform at the surface of contact
The two bodies will momentarily come to rest after collision
All of these
The two bodies begin to regain their original shape

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Engineering Mechanics
A machine having an efficiency less than 50%, is known as

Non-reversible machine
Neither reversible nor non-reversible machine
Ideal machine
Reversible machine

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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

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

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Engineering Mechanics
In order to double the period of simple pendulum, the length of the string should be

None of these
Halved
Doubled
Quadrupled

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MORE MCQ ON Engineering Mechanics

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