π/32 (D⁴ + d⁴)
π/64 (D⁴ + d⁴)
π/32 (D⁴ × d⁴)
π/32 (D⁴ - d⁴)

Zero
Maximum
Minimum
Varying

30°
60°
45°
None of these

## Applied Mechanics and Graphic Statics The motion of a particle moving with S.H.M. from an extremity to the other, constitutes

None of these
Two oscillations
One full oscillation
Half an oscillation

## Applied Mechanics and Graphic Statics The Law of Polygon of Forces states that

If forces acting on a point can be represented in magnitude and direction by the sides of a polygon in order, the forces are in equilibrium
If forces acting on a point can be represented of a polygon taken in order, their sides of a polygon taken in order, their resultant will be represented in magnitude and direction by the closing side
If a polygon representing the forces acting at point in a body is closed, the forces are in equilibrium
If forces acting on a point can be represented in magnitude and direction by the sides of a polygon taken in order, then the resultant of the forces will be represented in magnitude and direction by t

## Applied Mechanics and Graphic Statics The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

(a² + ab + b²)/3 (a + b)
(a² + ab + c²)/3 (a + c)
None of these
(b² + bc + c²)/3 (b + c)