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Engineering Mechanics

Engineering Mechanics
The coefficient of friction depends upon

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

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

(∑V)2 +(∑H)2 +2(∑V)(∑H)
(∑V)2 + (∑H)2
√[(∑V)2 + (∑H)2]
√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]

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Engineering Mechanics
Which of the following are vector quantities?

Linear velocity
All of these
Linear displacement
Linear acceleration

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Engineering Mechanics
If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

Equal to
None of these
Greater than
Less than

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Engineering Mechanics
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

Downwards
None of these
Horizontal
Upwards

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Engineering Mechanics
The C.G. of a solid hemisphere lies on the central radius 3r

At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base

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