The following mix of
JavaScript &
HTML allows one to
calculate the
speed required to
escape from the surface of any
planet or
meteorite in space against the force of
gravity. Type in the
mass of the planet in kg. Type in the
diameter of the planet.
<html>
<head>
<meta http-equiv="Content-Script-Type" content="text/javascript">
<meta NAME="Author" CONTENT="M.H.Fischer">
<meta NAME="Description" CONTENT="Phobos v2">
<title>escapespeed - v2</title>
</head>
<body bgcolor= "#000000" text= "#ffffff" >
<center>
<form name="Test">
<h2>Escape from gravity of eg.mars moon PHOBOS - v2</h2>
<HR>
<table>
<tr><td>
squareroot mass M in kg (
</td><td>
<input name="mass" value="11000000000000000">
</td><td>
*
</td></tr>
<tr><td>
gravity 2G (2*6,67*10e-11)
</td><td>
<input name="G" value="0.0000000008602324614">
</td><td>/
</td></tr>
<tr><td>
diameter d in meters m
</td><td>
<input name="r" value="23000">
</td><td>
)
</td></tr>
<tr><td>
v2
</td><td>
<input type=button
value=" = calculate = "
onClick="Test.v2.value=Math.sqrt(Test.mass.value*Test.G.value/Test.r.value)">
</td><td>
</td></tr>
<tr><td>
</td><td>
<input name="v2"> m/s
</form>
</td><td>
</tr>
</table>
<HR>
</center>
</body>
</html>