The 'back court' actually has two meanings. The first refers to the players at the two positions of Point Guard and Shooting Guard. Collectivly they are refered to as a teams 'back court'. Whereas...
When the ball and the person with possession of the ball cross into the front court (offensive side), then the ball is touched by the same team (without being deflected) in the backcourt
When you put a backspin on a ball, the direction of the ball is going backwards. So when it finally hits any surface, it then hits that surface with the direction of the ball forcing it to go...