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Engineering Mechanics

Engineering Mechanics
The rate of change of displacement of a body is called

Momentum
None of these
Velocity
Acceleration

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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
+9.8 m/s2
+8.9 m/s2

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Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

mr²/2
mr²
2mr²/3
2mr²/5

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

πN/60
2πN/180
πN/180
2πN/60

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Non-reversible machine
Ideal machine
Neither reversible nor non-reversible machine
Reversible machine

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Engineering Mechanics
The wheels of a moving car possess

Kinetic energy of rotation only
Kinetic energy of translation only
Potential energy only
Kinetic energy of translation and rotation both

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