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Engineering Mechanics

Engineering Mechanics
The rate of doing work is known as

None of these
Kinetic energy
Power
Potential energy

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Engineering Mechanics
In order to determine the effects of a force, acting on a body, we must know

Line of action of the force
Magnitude of the force
Nature of the force i.e. whether the force is push or pull
All of these

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Increase
None of these
Decrease
Not be effected

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

Kinetic energy
Electrical energy
Chemical energy
Potential energy

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Engineering Mechanics
The angle between two forces when the resultant is maximum and minimum respectively are

90° and 0°
90° and 180°
0° and 180°
180° and 0°

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Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

7mr²/3
2mr²/3
7mr²/5
2mr²/5

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