Question: You are driving toward an intersection at 20 m/s when billboard catches your eye. While looking at it the light changes from green to red.

You are driving toward an intersection at 20 m/s when billboard catches your eye. While looking at it the light changes from green to red. You look back at the intersection you are approaching when you are about 50 m away from the intersection. It takes you half a second to react before you step on break. What is the minimum acceleration needed so that you are able to stop right at the beginning of the inter

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