 # Friction in Applied Mechanics objective questions and answers

41.  Kinetic friction is

A. Maximum value of frictional force when a body is about to move

B. Friction between two well lubricated bodies

C. Friction force acting when the body is in motion

D. Friction force which keeps a body in motion

C. Friction force acting when the body is in motion

42.  Coulomb friction is

A. Friction between electrically charged bodies

B. Friction between bodies having relative motion

C. Friction between solids and liquids

D. Friction between dry surfaces

D. Friction between dry surfaces

43.  The limiting force of friction is

A. The value of friction force which stops the movement of the body

B. The value of friction force which cannot exit under a situation

C. The friction force acting on the body is just about to move

D. The friction force acting on a body when it is in motion

C. The friction force acting on the body is just about to move

44.  If the angle of friction is zero a body will experience

A. Infinite friction

B. Zero friction

C.The force of friction will act normal to the plane

D. The force of friction will act in the direction of motion

B. Zero friction

45.  Polar moment of inertia is

A. Same as moment of inertia

B.Applicable to masses whereas moment of inertia is applicable to area only

C. The moment of inertia for an area related to a line or axis perpendicular to the plane of the area

D.The moment of inertia for an area related to a line or axis parallel to the centroidal axis