PHP Distance::HandleA示例

        $this->u = $u;
        $this->g = $g;
        $this->t = $t;
    }
    function HandleA($f, $u, $m, $g, $t)
    {
        $this->a = ($f * 1.732 / 2 - $u * ($m * $g - $f * 0.5)) / $m;
        $this->x = 0.5 * $this->a * $t * $t + $this->a * $this->a * $t * $t / (2 * $u * $m * $g);
    }
    function __destruct()
    {
        echo "1：结果是:" . $this->x;
    }
}
$resultA = new Distance(40, 0.5, 5, 10, 2);
$resultA->HandleA(40, 0.5, 5, 10, 2);
/**
一光滑R=1m的圆环内，小球获得初速度v0，从最低点沿轨道上升，恰好经过最高点，
求初速度v0?
*/
class Balance
{
    private $g;
    private $r;
    private $v0;
    function HandleB($g, $r)
    {
        $this->g = $g;
        $this->r = $r;
        $this->v0 = sqrt(5 * $this->g * $this->r);
    }