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Predict/Calculate A popular ride at amusement parks is illustrated in Figure 6-74. In this ride, people sit in a swing that is suspended from a rotating arm. Riders are at a distance of 12 m from the axis of rotation and move with a speed of 25 mi/h. (a) Find the centripetal acceleration of the riders. (b) Find the angle θ the supporting wires make with the vertical. (c) If you observe a ride like that in Figure 6-74 or as shown in the photo on page 178, you will notice that all the swings are at the same angle θ to the vertical, regardless of the weight of the rider. Explain.
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