Here is another applet about circular motion.

It was designed to illustrate relation/constraint for circular motion: a=V2/R.

Red arrow is the instance velocity $V(t)$,

arrow with color "magenta" is $V(t+dt)$

The blue arrow is $dvec{V}=vec{V}(t+dt)-vec{V}(t)$ which is always pointing toward the center.

with $d heta=V*dt/R$ ,

so It's length $|dvec{V}|=V d heta=V* V*dt/R$,

so $frac{dvec{V}}{dt}=frac{V^2}{R}$Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list

It was designed to illustrate relation/constraint for circular motion: a=V2/R.

Red arrow is the instance velocity $V(t)$,

arrow with color "magenta" is $V(t+dt)$

The blue arrow is $dvec{V}=vec{V}(t+dt)-vec{V}(t)$ which is always pointing toward the center.

with $d heta=V*dt/R$ ,

so It's length $|dvec{V}|=V d heta=V* V*dt/R$,

so $frac{dvec{V}}{dt}=frac{V^2}{R}$Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list

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