A 4.6 m massless rod is loosely pinned (free to rotate) to a frictionless pivot at O. A 2.857 kg ball is attached to the other end of the rod. The ball is held at A, where the rod makes a 30° angle above the horizontal, and is released. The ball-and-rod assembly then swings freely in a vertical circle between A and B. In the figure, the ball passes through points C, D and E. At C, the rod makes an angle of 30° below the horizontal. At D, the rod makes an angle of 90° below the horizontal and at E the rod is parallel with the horizontal.





What is the speed of the ball as it passes through point C? Blank 1. Calculate the answer by read surrounding text.
m/s

What is the speed of the ball as it passes through point D? Blank 2. Calculate the answer by read surrounding text.
m/s

What is the speed of the ball as it passes through point E? Blank 3. Calculate the answer by read surrounding text.
m/s