Acrobats perform "Water Meteor"

Water will not overflow from the cup at the highest point. The gravity of water and the pressure from the bottom of the cup are used to provide the centripetal force of circular motion. A mistake.

The highest point is f+mg = mv 2/R.

F+5 = 0.5 * 4 2/ 1.6 f = 5-5 = 0。 According to the calculation, the tension of the rope and the pressure at the bottom of the container are zero. B correct.

At the highest point, water is completely weightless, but it is still affected by gravity. C error.

From the above calculation, we can know the D error.