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Engineering Mechanics

Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Non-reversible
None of these
Ideal
Reversible

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Engineering Mechanics
One joule is equal to

0.1 N-m
10 N-m
1 N-m
100 N-m

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Engineering Mechanics
The energy possessed by a body, for doing work by virtue of its position, is called

Kinetic energy
Chemical energy
Potential energy
Electrical energy

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Engineering Mechanics
The range of a projectile is maximum, when the angle of projection is

90°
45°
30°
60°

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

2L/3
L/2
L/3
3L/4

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 - sinφ)/(1 + sinφ)
(1 + tanφ)/(1 - tanφ)
(1 - tanφ)/(1 + tanφ)
(1 + sinφ)/(1 - sinφ)

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