Asked by Sarah

The speed limit near a school is 30km/h but Joe Cool thinks he can ignore it. He is driving at 60km/h. To make matters worse, he is talking on his cell phone. Suddenly a child rides his bicycle out of school grounds and across the road on the pedestrian crossing. The maximum rate at which Joe can slow down is 8m/s squared. How far away from the child must Joe be when he first sees the child? (before he applies the brakes) in order to stop in time.
Thanks

Answers

Answered by Chanz
v^2 = 2ax.
You'll have to turn the kph into m/s as well.
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