Refer to the figure for Prob. 5/177. Car A is traveling along the straightaway with speed v, and this speed is decreasing at a rate a. Car C is moving along the circular off-ramp with speed v/2, and this speed is decreasing at a rate a /2. Determine the velocity and acceleration which car A appears to have to an observer fixed to car C. Use the values v = 60 mi /hr, a = 10 ft /sec2, and R = 200 ft, and utilize the x′-y′ coordinates shown in the figure.

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y. 2 R 60° 60° Problem 5/177