two cars A and B are moving in same direction with 30m/s and 20m/s when car A is - Physics - Motion In A Straight Line

Question

two cars A and B are moving in same direction with 30m/s and
20m/s when car A is at a distance d behind the carB the driver of
the car A applies brakes producing uniform retardatiopn of 2m/s ,
there will be the minimum distance for the collision not to take
place

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two cars A and B are moving in same direction with 30m/s and 20m/s . when car A is at a distance d behind the carB the driver of the car A applies brakes producing uniform retardatiopn of 2m/s ., there will be the minimum distance for the collision not to take place