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Circular Motion and Gravitation6

# Circular Motion and Gravitation6 - CIRCULAR MOTION AND...

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C IRCULAR M OTION AND G RAVITATION 6 Answers to Multiple-Choice Problems 3. C 5. C 14. A Solutions to Problems 6.2. Set Up: Since the stone travels in a circular path, its acceleration is directed toward the center of the circle. The only horizontal force on the stone is the tension of the string. Set the tension in the string equal to its maximum value. Solve: (a) The free-body diagram for the stone is given in Figure 6.2. In the diagram the stone is at a point to the right of the center of the path. (b) gives 6.4. Set Up: Since the car travels in an arc of a circle, it has acceleration directed toward the center of the arc. The only horizontal force on the car is the static friction force exerted by the roadway. To calculate the minimum coefficient of friction that is required, set the static friction force equal to its maximum value, Friction is static friction because the car is not sliding in the radial direction.

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