Solved: Suppose you are driving a car in a
Chapter 8, Problem 8.79(choose chapter or problem)
Suppose you are driving a car in a counterclockwise direction on a circular road whose radius is r 390 m (see Figure 8.19). You look at the speedometer and it reads a steady 32 m/s (about 72 mi/h). (a) What is the angular speed of the car? (b) Determine the acceleration (magnitude and direction) of the car. (c) To avoid a rear-end collision with a vehicle ahead, you apply the brakes and reduce your angular speed to 4.9 102 rad/s in a time of 4.0 s. What is the tangential acceleration (magnitude and direction) of the car?
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