# Quadratic-function Sentence Examples

Conversely, if the kinetic energy T is expressed as a

**quadratic function**of x, x x3, y1, y2, y3, the components of momentum, the partial differential coefficient with respect to a momentum component will give the component of velocity to correspond.Thus if T is expressed as a

**quadratic function**of U, V, W, P, Q, R, the components of momentum corresponding are dT dT dT (I) = dU + x2=dV, x3 =dW, dT dT dT Yi dp' dQ' y3=dR; but when it is expressed as a**quadratic function**of xi, 'x2, x3, yi, Y2, Y3, U = d, V= dx, ' w= ax dT Q_ dT dT dy 1 dy2 dy The second system of expression was chosen by Clebsch and adopted by Halphen in his Fonctions elliptiques; and thence the dynamical equations follow X = dt x2 dy +x3 d Y = ..., Z ..., (3) = dt1 -y2?y - '2dx3+x3 ' M =..It follows from §§ 48 and 51 that, if V is a solid figure extending from a plane K to a parallel plane L, and if the area of every cross-section parallel to these planes is a

**quadratic function**of the distance of the section from a fixed plane parallel to them, Simpson's formula may be applied to find the volume of the solid.In the case of the sphere, for instance, whose radius is R, the area of the section at distance x from the centre is lr(R 2 -x 2), which is a

**quadratic function**of x; the values of So, Si, and S2 are respectively o, 7rR 2, and o, and the volume is therefore s.By drawing Ac and Ad parallel to BC and BD, so as to meet the plane through CD in c and d, and producing QP and RS to meet Ac and Ad in q and r, we see that the area of Pqrs is (x/h - x 2 /h 2) X area of cCDd; this also is a

**quadratic function**of x.In the case, therefore, of any solid whose cross-section at distance x from one end is a

**quadratic function**of x, the position of the crosssection through the centroid is to be found by determining the position of the centre of gravity of particles of masses proportional to So, S2, and 4S 1, placed at the extremities and the middle of a line drawn from one end of the solid to the other.Since T is a homogeneous

**quadratic function**.The next case is that in which u is a

**quadratic function**of x, i.e.