Circular Acceleration PREFLIGHT

The following three questions refer to the material you were to read in preparation for the lesson.

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# Amusement Park Physics

Start physlet.

A Ferris wheel rotates at constant speed as shown in the animation. Each square represents a chair on the Ferris wheel. What applied forces act on a rider when the rider is at point (a), (x,y) = (0,-6)?
Normal force upward, weight downward.
Normal force upward, weight downward, centripetal force upward. Review Section 5-2 in Giancoli.
Normal force upward, weight downward, centripetal force downward.
Normal force downward, weight downward, centripetal force upward.

# honors extra

### Airplanes

I was attending a conference in Colorado, and scheduled a flight to Aspen. The secretary would not fly into that airport, but preferred to drive from Denver. When I took the flight and approached the airport, I discovered why. The turboprop plane banked sharply, seeming to stand on one wing, and then dropped like a rock onto the runway. Why did the plane bank so sharply? What is the formula for the banking angle of the airplane given the airspeed and radius of the turn? Does this explain the turboprop bank (versus a 747, say.)?

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