A ball is thrown against a wall and bounces back toward the thrower with the same speed as it had before hitting the wall. Does the velocity of the ball change in this process? Explain.
Yes, when the ball bounces back from the wall, the direction of its velocity is different than when it approaches the wall.
No, the speed of the ball is the same, so the velocity is also the same before and after hitting the wall.
Yes, the speed of the ball changed when it hit the wall, so the magnitude of the velocity of the ball also changed.
No, with the information given, one cannot assume that the velocity changed.