4. A car is moving on a circular track as shown in Figure 12. roadway Figure 12 (a) What force provides the centripetal

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4 A Car Is Moving On A Circular Track As Shown In Figure 12 Roadway Figure 12 A What Force Provides The Centripetal 1 (132.08 KiB) Viewed 34 times

4. A car is moving on a circular track as shown in Figure 12. roadway Figure 12 (a) What force provides the centripetal acceleration for the car to stay on the track? What is the direction of this force? (2) (b) A trinket hangs on a string from a shaft on the rear view mirror of the car as shown in Figure 13. The figure shows its position in the vertical plane perpendicular to the direction of travel. rear-view mirror Figure 13 Explain why the string make an angle with the vertical as the car is turning. (c) Calculate this angle A when the car is moving at a speed of 45 Km per hour. The radius of the circular track is 24 m. Your answer should be in degrees. (d) Explain why circular roads are sometimes banked. (e) Suppose the road was banked at an angle = 15° and the car was travelling at the same speed of 45 Km per hour. Would the inward frictional force between the tires and the road increase, decrease or stay the same as before? Explain. (1) (3) (2) (1) Total: 9 points