You are driving to the grocery store at 21.5 ms. what, Ask an Expert

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You are driving to the grocery store at 21.5 m/s. You are 96.56 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.3 s and that your car brakes with constant acceleration.

Q: How far are you from the intersection when you begin to apply the brakes?
Q: What acceleration will bring you to rest right at the intersection?
Q: How long does it take you to stop?

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