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Engineering Mechanics

Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/180
2πN/60
πN/60
πN/180

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Engineering Mechanics
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

Principle of independence of forces
Principle of resolution of forces
Principle of transmissibility of forces
None of these

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

Mechanical advantage to the velocity ratio
Output to the input
Work done by the machine to the work done on the machine
All of these

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

+8.9 m/s2
+9.8 m/s2
-8.9 m/s2
-9.8 m/s2

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Engineering Mechanics
The unit of angular velocity is

Both (B) and (C)
m/min
rad/s
Revolutions/min

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Engineering Mechanics
A couple produces

Rotational motion
Translatory motion
Combined translatory and rotational motion
None of these

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