Remember, kids...

[essentialsaltes]

Momentum is mass times velocity.
Momentum is a conserved quantity.
Form a hypothesis.

Comments

[freudinshade.livejournal.com]

I see your collision and I double the number of balls:
http://www.killsometime.com/videos/6842/4-Guys-Exercise-Ball-Launch

Though, I have to admit, the young lady in your video does appear to have the more awkward and potentially life threatening landing.

[essentialsaltes.livejournal.com]

Nice, that one's also good for an advanced lesson on center of gravity and torque. You can see the difference between holding it waist high and chest high.