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Relative velocity

F​rom: nileshnegi

Subject: kinematics

Message Body:
on a 2 lane road,car A is travelling with a speed of 36 km/hr 2 cars B n C approach car A  in opposite direction with a speed of 54km/hr each. at a certain instant when distance AB is equal to AC both bieng 1 km.. B decide to over lap A before C does . what minimum of acc of car  B is required to avoid an accident with car A?

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