ENGINEERING MECHANICS QUIZ

Concurrent forces are those forces whose lines of action

None of these

Meet on the same plane

Lie on the same line

Meet at one point

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The friction experienced by a body, when at rest, is known as

Dynamic friction

Static friction

Limiting friction

Coefficient of friction

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The moment of a force

Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force

Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken

All of these

Is the turning effect produced by a force, on the body, on which it acts

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Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(1/3) Ml²

(3/4) Ml²

(1/12) Ml²

(2/3) Ml²

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The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Like parallel forces

Unlike parallel forces

Coplanar concurrent forces

Coplanar non-concurrent forces

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One joule means that

Work is done by a force of 1 g when it displaces a body through 1 cm

Work is done by a force of 1 kg when it displaces a body through 1 m

Work is done by a force of 1 N when it displaces a body through 1 m

Work is done by a force of 1 dyne when it displaces a body through 1 cm

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The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplanar concurrent forces.

None of these

Either A or B

Do not lie

Lie

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Static friction is always __________ dynamic friction.

Greater than

Less than

Equal to

None of these

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One kg force is equal to

8.9 N

12 N

7.8 N

9.8 N

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

Sense of angular displacement

Direction of the axis of rotation

All of these

Magnitude of angular displacement

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