Strength of Materials
Pick up wrong statement about friction force for dry surfaces. Friction force is

proportional to velocity of sliding
proportional to normal load between the surfaces
independent of the area of contact surfaces
dependent on the materials of contact surface

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
According to Lami's theorem

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
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
Three forces acting at a point will be in equilibrium

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Limiting force of friction is the

Tangent of angle between normal reaction and the resultant of normal reaction and limiting friction
The friction force acting when the body is just about to move
the friction force acting when the body is in motion
Ratio of limiting friction and normal reaction

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Coefficient of friction is the

ratio of limiting friction and normal reaction
angle between normal reaction and the resultant of normal reaction and the limiting friction
the friction force acting when the body is just about to move
the friction force acting when the body is in motion

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Strength of Materials