What can we learn about physics from an amusement park ride? This videosegment, produced for Teachers' Domain, uses roller coaster footage todemonstrate that what really keeps people pinned to their seats as aroller coaster hurtles through a loop isn't just the seat belts, it's centripetal force. To reinforce this important scientific principle,a physics teacher successfully swings a cup of water around his headwithout spilling a drop.
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