The pendulum in a grandfather clock makes 20 complete swings A-B-A per minute. THe distance between the points A and B, which are at the maximum end of the swing, is 40 cm. Make a sketch to show complete cycles of the pendulam, starting from point A. Determine an equation that will predict the perpendicular distance p from the vertical line as a function of time. What is the position of the pendulum after 40 s.
