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- C (bottom of hill #1)
- D (top of the vertical loop)
- E (bottom of the vertical loop)
- F (bottom of hill #2)
- lift hill (going up at constant speed)
15. Using the diagram of the Terminator Express, indicate at which of the following points the centripetal force is up, when it is down, when it is zero, and when it is sideways.
- C (bottom of hill #1)
- D (top of the vertical loop)
- E (bottom of the vertical loop)
- F (bottom of hill #2)
- lift hill (going up at constant speed)
- horizontal loop
- back curve
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