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Engineering Mechanics

Engineering Mechanics
For a self locking machine, the efficiency must be

1
Less than 50%
Greater than 50%
Equal to 50%

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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
None of these
15 N and 15 N

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Engineering Mechanics
The total motion possessed by a body, is called

Momentum
Weight
Impulsive force
Mass

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Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Less than
Equal to
Greater than
None of these

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Engineering Mechanics
In order to determine the effects of a force, acting on a body, we must know

Line of action of the force
Nature of the force i.e. whether the force is push or pull
Magnitude of the force
All of these

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

(p² - q²)/4
(p² + q²)/4
(4p² - q²)/6
[√(4p² - q²)]/6

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