Re: think about this...
[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
doubtful, that fan doesn't look very powerful.
if it did move, it would move backwards.
[/ QUOTE ]
pretend it's powerful enough
[/ QUOTE ]
i have zero college training, but the forces should balance, no? no movement of the skateboard (assuming the sail and fan are secured to the board)
[/ QUOTE ]
Don't think of the sail as an opposing force, but rather as a redirecting force.
If you blow into your cupped hands, you are redirecting the wind, not canceling it.
|