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today i noticed/realized something interesting. i probably would have never thought about this if i didnt take ap physics with you, doc. while i was walking around today, i was pushed by a really strong wind. it was so strong i had to pretty much had to lean over and gave a little more strength in each step i take. then i realized, wait a second, how does this happen and how would i calculate this bad boy. i understand air resistance because it is like friction, its just there and you know it since there must be somekind of force to against the force put in. wind, on the other hand, is an interesting force. its just there 24/7 like jack-in-the-box drive thru but depending on the days and time, the strength differs. i just wondered, how the heck does this occur. is it because earth is rotating? how would be calculate how much force a wind exerts on us? it may be quite interesting to figure those stuff out.