My Second Life

<?
//Calculates effect of gravity on objects from height in centimeters (defined in the variable H)
$H = 1000;
$multiplication = 2 * $H;
$division = $multiplication / 980;
print("Seconds taken to fall from $H centimeter(s): ");
echo(sqrt($division) . "<br />");
?>

<?
//Calculates Potential Energy (M defines mass in KG, G defines gravity, H defines height in meters)
$M = 58.9670;
$G = 9.8;
$H = 50;
$multiplication = $M * $G * $H;
print("Potential Energy in object $M kg with $G gravity from $H meters high: ");
echo(($multiplication) . " Joules<br />");
?>

<?
//Calculates Momentum (M defines mass in KG and V defines velocity)
$M = 58.9670;
$V = 25;
$multiplication = $M * $V;
print("Momentum of an object with a mass of $M and a velocity of $V : ");
echo(($multiplication) . " Newtons<br />");
?>

<?
//Calculates Kinetic Energy (M defines mass in KG and V defines velocity)
$M = 58.9670;
$V = 25;
$velocitysquared = $V * $V;
$division = $M / 1/2;
$finalmultiply = $velocitysquared * $division;
print("Kinetic Energy in $M kg with a velocity of $V meters per second squared: ");
echo(($finalmultiply) . " Joules<br />");
?>