problem 1 as a simple pendulum swings back and forth the forces acting
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Problem 1. As a simple pendulum swings back and forth, the forces acting on it are gravity, the tension in the supporting cord and air resistance. (a) Which of these
forces, if any, does no work on the pendulum? (b) Which of these forces, if any, does negative work at all times during the motion.(c) Describe the work done by the gravitational force while the pendulum is swinging.