A pendulum is constructed by attaching a small metal ball to one end of a string of length L = 1.45 m that hangs from the ceiling, as shown in the figure. The ball is released when it is raised high enough for the string to make an angle of 0 = 20.0° with the vertical. v = ? With what speed v is the ball moving at the bottom of its swing? U = m/s Does the mass of the ball affect the answer? O Yes, because the work done on the ball by the gravitational force depends on the mass. O No, because the ball's speed is independent of its mass. No, because the change in string tension counteracts the change in mass. Yes, because changing the mass changes the ball's inertia.

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