Question

The speed limit in a school zone is 40.0 km/hr. A driver traveling at this speed sees a child run into the road 14 m ahead of the car. The driver applies the brakes and the car slows at a uniform rate of 8.3 m/s^2. If the driver's reaction time is 0.27 sec, what distance does the car travel before stopping?

Answer 1

distance=vi*(t+.27)-1/2 8.3 (t^2)
solve for time t. change vi to m/s

Answer 2

45

Answer 3

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