Caution: This applet requires a Java Development Kit 1.1 compatible browser. One reason is that version 1.1 of Java allows much cooler stuff to be done, even though the applet as written doesn't take advantage of it yet. The only browser I know of which supports JDK1.1 today is HotJava, available free from Sun if you register as a Java developer, but both Netscape and Internet Explorer are expected to offer compatible browsers soon. Here is what the applet looks like in a compatible browser. In the meantime, our non-Java solver (which accepts all Galilean-kinematic input combinations, in meters and seconds) should work for most anyone.