For any system of coplanar forces, the condition of equilibrium is that the

Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

A

Concurrent

B

Parallel

C

Concurrent parallel

D

None of these

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.

A

Equal to

B

Less than

C

Greater than

D

None of these

A system of coplanar forces is in equilibrium when

A

Force polygon closes

B

Funicular polygon closes

C

Both force polygon" and funicular polygon close

D

All the forces are concurrent

Non-coplanar concurrent forces are those forces which

A

Meet at one point, but their lines of action do not lie on the same plane

B

Do not meet at one point and their lines of action do not lie on the same plane

C

Meet at one point and their lines of action also lie on the same plane

D

Do not meet at one point, but their lines of action lie on the same plane

Coplanar concurrent forces are those forces which

A

Meet at one point, but their lines of action do not lie on the same plane

B

Do not meet at one point and their lines of action do not lie on the same plane

C

Meet at one point and their lines of action also lie on the same plane

D

Do not meet at one point, but their lines of action lie on the same plane

Non-coplanar non-concurrent forces are those forces which

A

Meet at one point, but their lines of action do not lie on the same plane

B

Do not meet at one point and their lines of action do not lie on the same plane

C

Do not meet at one point but their lines of action lie on the same plane

D

None of the above

Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

A

Meet

B

Do not meet

C

Either ‘A’ or ‘B’

D

None of these

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

A

Lie

B

Do not lie

C

Either A or B

D

None of these

Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

A

Their algebraic sum is zero

B

Their lines of action are at equal distances

C

The algebraic sum of their moments about any point in their plane is zero

D

The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then

A

Their algebraic sum is zero

B

Their lines of action are at equal distances

C

The algebraic sum of their moments about any point in their plane is zero

D

The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

For any system of coplanar forces, the condition of equilibrium is that the

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