Braking, no reaction time. Modern cars with a computer system using radar can eliminate the normal reaction time for a driver to recognize an upcoming danger and apply the brakes. For example, the system can detect the sudden stopping of a car in front of a driver by using radar signals that travel at the speed of light. Rapid processing then can almost immediately activate the braking. For a car traveling at v=31.3 m/s(70mi/h) and assuming a normal reaction time of 0.750 s, find the reduction in a car's stopping distance with such a computer system.
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