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Engineering Mechanics

Engineering Mechanics
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

120°
60°
30°
90°

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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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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

2D/(D + d)
2D/(D - d)
D/(D - d)
D/(D + d)

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

Work is said to be done
None of these
Body has kinetic energy of translation
Power is being transmitted

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Engineering Mechanics
Which of the following are vector quantities?

Linear acceleration
Linear velocity
Linear displacement
All of these

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Engineering Mechanics
A redundant frame is also called __________ frame.

Imperfect
Perfect
Deficient
None of these

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