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Engineering Mechanics

Engineering Mechanics
An ideal machine is one whose efficiency is

Between 60 and 70 %
Between 80 and 90%
Between 70 and 80%
1

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Engineering Mechanics
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

Greater than
Equal to
Less than
None of these

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Maximum
Minimum
Zero
Infinity

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Engineering Mechanics
The time of flight of a projectile on downward inclined plane depends upon

Both (A) and (B)
Angle of projection
None of these
Angle of inclination of the plane

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Engineering Mechanics
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

1.5 cm
1.0 cm
2.5 cm
0.5 cm

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Engineering Mechanics
A force while acting on a body may

Give rise to the internal stresses in it
All of these
Change its motion
Balance the forces, already acting on it

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