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Your friend is on Rollerblades holding a pendulum You gently push her forward and let go You observe that the pendulum first swings in the opposite direction (backward) and then returns to the vertical orientation as she coasts forward. (a) Draw a force diagram to explain the behavior of the pendulum bob as your friend is being pushed. (b) How can you use it to determine the acceleration of your friend while you are pushing her? (c) Why does the pendulum return to its vertical orientation after you stop pushing your friend?
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