Active Physics 2.4 Quiz

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1. ________________ force is the center-directed force that acts to keep an object moving in a circle.
2. What happened to the marble on the pie pan with a slot cut in it?
3. What is the name of the centripetal force that keeps the moon orbiting the Earth?
4. What is the average speed (in miles per hour) of an airplane that flies from Seattle to San Francisco (720 miles) in 90 minutes ?
5. What is the average speed (in miles per hour) of the Cassini spacecraft to travel to Saturn (884 million miles) in 6.5 years ?