A Circular Roadway and the Acceleration of Your Car "T (decreasing) (a) Constant angular speed (b) Decreasing angular speed Suppose you are driving a car in a counterclockwise direction on a circular road whose radius is r= 390 m (see Figure 8.20). 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 x 10-2 rad/s in a time of 4.0 s. What is the tangential acceleration (magnitude and direction) of the car?

A Circular Roadway and the Acceleration of Your Car "T (decreasing) (a) Constant angular speed (b) Decreasing angular speed Suppose you are driving a car in a counterclockwise direction on a circular road whose radius is r= 390 m (see Figure 8.20). 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 x 10-2 rad/s in a time of 4.0 s. What is the tangential acceleration (magnitude and direction) of the car?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter3: Characteristics Of The Driver, The Pedestrian, The Bicyclist, The Vehicle, and The Road

Section: Chapter Questions

Problem 9P

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