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Two cars 1 and 2 move with velocity v1 and v2 respectively on a straight road in the same direction. When the cars are separated by distance d, the driver of car 1 applies brakes and the car moves with uniform retardation a1. Simultaneously, car 2 starts accelerating with a2. If v1>v2, find the minimum initial seperation between the cars to avoid collision between them.
While doing this, i reached at the equation:
d = (v1 - v2)2 - (v'1 - v'2)2 / 2(a1 + a2)
After this it is given in solution that d is max when v'1 = v'2... can you explain this relation..?
Or suggest me some better alternative method..
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