This applet hope to help you understand relation betwen x(t), v(t) and a(t).

$v(t)=limit_{\Delta t\rightarrow 0}\frac{\Delta x}{\Delta t}= \frac{dx(t)}{dt}$ ,  and $a(t)=\frac{d v(t)}{dt}$

The applet will draw x(t),v(t) and a(t) when you drag the tiger horizontally =>to change it's position.
You can also set up acceleration or velocity with slider and click accelerate to star the acceleration.
The [b]step[/b] is for you to move one time step at a time.

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/dragx2vtat_pkg/dragx2vtat.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list