The formula for the air resistance in the following applet is k1*v+k2*v2.
If you set k1=k2=0, then there is no air resistance.
If you set k1=0 or k2=0,then you can study different cases.
I would suggest you starts with the default setting, k1=k2=0. (The object will move out the default range, the scale will change automatically- you can adjust the scale from the slider at the right edge)
Then change k1 to either 0.01 or 0.1 and check out the effect.
Then set k1=0 and k2=0.001 , 0.01 or 0.1 and check out the effect.
(It will remember the last 5 traces) Enjoy it.

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