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Engineering Mechanics

Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

√2.g
g/2
2g
g

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Engineering Mechanics
The rate of doing work is known as

Kinetic energy
Power
None of these
Potential energy

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.8 r
0.7 r
0.5 r
0.6 r

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Engineering Mechanics
The coefficient of friction depends upon

All of these
Nature of surfaces
Area of contact
Shape of the surfaces

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Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

8r/3
3r/ 8
4r/ 3π
3r/4π

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P - m.a = 0
P/m.a = 0
P + m.a = 0
P × m.a = 0

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