Wednesday, May 27, 2009

Great Adventure Labs

There are places in the lab sheets and related material that undo some of what we accomplished this year. PLEASE remember that there is no force throwing you backward when the bus starts: the bus goes forward while you try to stand still (you may overbalance and then gravity will  put a torque on you that causes you to head toward the bus's floor, but that is different from simply being thrown backward). 
Again, there is no force flinging you outward when the bus ( or a ride) goes around a turn. You try to go straight while the bus changes direction so the wall of the bus ( or the ride) needs to push on you to give you the required centripetal acceleration  for you to make the turn. When a ride slows suddenly, you don't surge forward, you just try to keep going as the ride stops.

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