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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd4/32
πd4/64
πd3/16
πd3/32

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

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Engineering Mechanics
Moment of inertia is the

Second moment of force
All of these
Second moment of area
Second moment of mass

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

All of these
The centre of heavy portion
The midpoint of its axis
The bottom surface

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Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

2mr²/5
4mr²/5
3mr²/5
3mr²/10

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P - m.a = 0
P/m.a = 0
P × m.a = 0
P + m.a = 0

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