This explanation is incorrect. A high speed does not guarantee a pressure lower than atmospheric pressure. When the hair dryer tilts and blows out air. To keep this ball in the air, there must be an upward force to balance gravity. After the air hits the sphere, its velocity decreases and its pressure increases. At this time, the pressure is higher than atmospheric pressure. The position is in the bottom right corner of the ball in the video. So, the force F1 caused by this pressure points towards the upper left corner of the video. In addition, the air hitting the ball will change direction and move upwards along the sphere. Due to the curvature of the sphere and the linear inertia of air, there is a tendency for air to move away from the sphere along its normal, resulting in low pressure. So a force F2 was generated towards the upper right, which together with the force F2 caused the ball to float in the air. So, this is not the result of Bernoulli's principle. After hitting the ball with air, the speed will indeed increase, but this will not result in the generation of pressure below atmospheric pressure.
This explanation is incorrect. A high speed does not guarantee a pressure lower than atmospheric pressure.
When the hair dryer tilts and blows out air. To keep this ball in the air, there must be an upward force to balance gravity. After the air hits the sphere, its velocity decreases and its pressure increases. At this time, the pressure is higher than atmospheric pressure. The position is in the bottom right corner of the ball in the video. So, the force F1 caused by this pressure points towards the upper left corner of the video. In addition, the air hitting the ball will change direction and move upwards along the sphere. Due to the curvature of the sphere and the linear inertia of air, there is a tendency for air to move away from the sphere along its normal, resulting in low pressure. So a force F2 was generated towards the upper right, which together with the force F2 caused the ball to float in the air.
So, this is not the result of Bernoulli's principle. After hitting the ball with air, the speed will indeed increase, but this will not result in the generation of pressure below atmospheric pressure.