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Engineering Mechanics

Engineering Mechanics
The coefficient of friction depends upon

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

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

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

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Varies from point to point
Is constant at every instant
Is minimum in the start and maximum at the end
Is maximum in the start and minimum at the end

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Engineering Mechanics
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Downwards at its upper end
Upwards at its upper end
Perpendicular to the wall at its upper end
Zero at its upper end

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 - tanφ)/(1 + tanφ)
(1 + tanφ)/(1 - tanφ)
(1 + sinφ)/(1 - sinφ)
(1 - sinφ)/(1 + sinφ)

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Engineering Mechanics
In order to completely specify angular displacement by a vector, it must fix

Magnitude of angular displacement
Sense of angular displacement
All of these
Direction of the axis of rotation

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MORE MCQ ON Engineering Mechanics

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