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A car is travelling at 50 km h brakes as hard as it can and stops in a distance of 15 m. Suppose that

 

A car is travelling at 50 km h brakes as hard as it can and stops in a distance of 15 m. Suppose that the maximum braking force is no dependent on speed i.e. the coefficient of kinetic friction is constant. What is the shortest stopping distance when the car is travelling at 75 km h-1?

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