First attempted before course https://blogs.ulster.ac.uk/b00835256/files/2021/12/bouncing-ball.mp4 Bowling ball https://blogs.ulster.ac.uk/b00835256/files/2021/11/bowling-ball_3.mp4 Tennis ball https://blogs.ulster.ac.uk/b00835256/files/2021/12/Tennis-ball-with-and-without-path.mp4 Rubber Ball https://blogs.ulster.ac.uk/b00835256/files/2021/12/Rubber-ball-with-and-without-a-path.mp4