## Applied Mechanics and Graphic Statics Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis?

Disc with smaller density
Both discs will have same rotational inertia
None of these
Disc with larger density

## Applied Mechanics and Graphic Statics On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force

Acts away from the centre of rotation
Is mw2r/g kgf
Acts tangentially to the circular path
Acts towards the centre of rotation

## Applied Mechanics and Graphic Statics The resultant of the forces acting on a body will be zero if the body

Rotates
Moves along a curved path
Does not move at all
Moves with variable velocity in a straight line

## Applied Mechanics and Graphic Statics Maximum efficiency of a screw jack for the angle of friction θ, is

sin θ/(1 + sin θ)
(1 - sin θ)/(1 + sin θ)
(1 - sin θ)/sin θ
(1 + sin θ)/(1 - sin θ)

## Applied Mechanics and Graphic Statics The condition of equilibrium for any system of forces in a plane is

None of these
That resultant couple must be zero
That polygon of forces must close
Both (A) and (B)

## Applied Mechanics and Graphic Statics Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by

Its shorter side
The diagonal of the parallelogram which passes through the point of intersection of the forces
Its longer side
The diagonal of the parallelogram which does not pass through the point of intersection of the forces