The angle which an inclined surface makes with the horizontal when a body placed on its is on the point of moving down, is called

 

(A) angle of inclination

 

(B) angle of friction

 

(C) angle of repose

 

(D) none of these

Which one of the following laws is not applicable to a simple pendulum?

(A) The time period is inversely proportional to √g where g is the acceleration due to gravity

(B) The time period is proportional to √l where l is length

(C) The time period does not depend on its magnitude

(D) The time period is proportional to its length l

The locus of the instantaneous centre of a moving rigid body, is

(A) centroid

(B) involute

(C) straight line

(D) spiral

Engineer's units of force, is

(A) Newton and dyne in absolute units

(B) Dyne in absolute units

(C) Newton in absolute units

(D) All the above

The shape of a suspended cable under its own weight is

(A) catenary

(B) circular

(C) elliptical

(D) parabolic

A number of forces acting simultaneously on a particle of a body

(A) may be replace by a couple

(B) may be replaced by a single force through C.G. of the body

(C) may be replaced by a single fore

(D) may not be replaced by a single force

The forces which meet at one point and have their lines of action in different planes are called

(A) intersecting forces

(B) coplaner non concurrent forces

(C) non coplaner concurrent forces

(D) non coplaner noncurrent forces

The maximum frictional force which comes into play, when a body just begins to slide over the surface of a other body, is known as

(A) limiting friction

(B) rolling friction

(C) sliding friction

(D) none of these

If rain falls in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

(A) more inclined when moving

(B) less inclined when moving

(C) less inclined when standing

(D) more inclined when standing

The force acting on a point on the surface of a rigid body may be considered to act

(A) at the centre of gravity of the body

(B) on the periphery of the body

(C) at any point on the surface normal to the line of action of the force

(D) on any point on the line of action of the force

A smooth cylinder lying on its convex surface remains

(A) in neutral equilibrium

(B) out of equilibrium

(C) in stable equilibrium

(D) in unstable equilibrium