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High school physics, entitled the safety of cars on the road should be maintained between the necessary distan

Answers:1   |   LastAnswerAt:2011.06  

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Constantine Dodge 
Asked at 2011.06.13 01:24:50
High school physics, entitled the safety of cars on the road should be maintained between the necessary distance from the problem of traffic laws
answer anne lane  Answered at 2011.06.13 01:24:50
Solution: Let movement distance s, the time of deceleration to 0 t108km / h = 30m / s Acceleration a = 530 * 0.7 +30 * t-5t = s30-5 * t = 0 solutions of equations of these two equations can be have s = 171m
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