According to Lami's theorem

Strength of Materials
According to Lami's theorem

If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Three forces acting at a point can be represented by a triangle, each side being proportional to force

Three forces acting at a point will be in equilibrium

If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Three forces acting at a point can be represented by a triangle, each side being proportional to force

Three forces acting at a point will be in equilibrium

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Strength of Materials
The C.G. of a plane lamina will not be at its geometrical centre in the case of a

right angled triangle

equilateral triangle

circle

square

right angled triangle

equilateral triangle

circle

square

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Strength of Materials
If a number of forces act simultaneously on a particle, it is possible

To replace them by a single force

Not a replace them by a single force

To replace them by a single force through C.G.

To replace them by a couple

To replace them by a single force

Not a replace them by a single force

To replace them by a single force through C.G.

To replace them by a couple

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Strength of Materials
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

kinematic friction

repose

friction

limiting friction

kinematic friction

repose

friction

limiting friction

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Strength of Materials
If n = number of members andy = number of joints, then for a perfect frame, n =

j-2

2/-3

(b)2j-l

(d)3/-2

j-2

2/-3

(b)2j-l

(d)3/-2

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Strength of Materials
According to principle of transmissibility of forces, the effect of a force upon a body is

The same at every point in its line of action

Maximum when it acts at the center of gravity of a body

Minimum when it acts at the C.G. of the body

Different at different points in its line of action

The same at every point in its line of action

Maximum when it acts at the center of gravity of a body

Minimum when it acts at the C.G. of the body

Different at different points in its line of action

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Strength of Materials

Strength of Materials According to Lami's theorem

Strength of Materials The C.G. of a plane lamina will not be at its geometrical centre in the case of a

Strength of Materials If a number of forces act simultaneously on a particle, it is possible

Strength of Materials The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

Strength of Materials If n = number of members andy = number of joints, then for a perfect frame, n =

Strength of Materials According to principle of transmissibility of forces, the effect of a force upon a body is

Strength of Materials
According to Lami's theorem

Strength of Materials
The C.G. of a plane lamina will not be at its geometrical centre in the case of a

Strength of Materials
If a number of forces act simultaneously on a particle, it is possible

Strength of Materials
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

Strength of Materials
If n = number of members andy = number of joints, then for a perfect frame, n =

Strength of Materials
According to principle of transmissibility of forces, the effect of a force upon a body is