## Q. 7.6

## Chapter 7

## Q. 7.6

A student is racing along in a sports car when suddenly, to avoid an impending collision, the driver slams on the brakes and skids along a straight line 200 ft to a stop in a 45 mph zone. Moments earlier, a policeman had checked the vehicle’s speed on radar. Assume *v* = 0.6, ignore air resistance, and determine if the officer might give the student a ticket for exceeding the limit. Show for this example that the work-energy equation is the first integral of the equation of motion.

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