This java applet let you play with projectile motion.
There are two case you can play with :
What is the meaning of the green ellipsetrace? I will let you find out by yourself.
Press the Start button, all the projectiles will spread out.
At any instance, the trajectory of all the projectiles is an arcof a circle.
Click the mouse button to suspend the animation, click it again to resume.
Press Reset button for default values.( now you can change thespeed by mouse)
What will happen with different initial speed?
The vertical distance between the above curve is the freefall distance at that moment.
The blue circle is the range when it is fired from the ground level.
Press Start to shoot the object(yellow) according to the initialconditions. At the same time,
displacement of green circle
displacement of yellow circle