The Obedient Ball
Operation: Press the "Start" button and observe the movement of the ball in the airflow. Function Overview: The exhibit consists of a vertical pipe, a horizontal U-shaped tube connected to it, a very light ball, and a fan. Press the button to start the fan, and you will see the ball moving along the airflow. When it reaches the upper end of the U-shaped tube, it obediently changes its vertical upward direction and enters the horizontal pipe. Why does the ball behave so obediently? According to Bernoulli's principle: the faster the fluid flow, the lower the pressure; the slower the flow, the higher the pressure. When the fan starts, the vertical upward airflow lifts the ball in the pipe and moves it upward along the center of the airflow. The vertical airflow creates a negative pressure in the U-shaped tube, with the lowest pressure at the lower end. When the ball reaches the upper end of the U-shaped tube, under the action of negative pressure, it obediently changes its vertical upward direction, is drawn into the horizontal pipe, and moves toward the lower end. In daily life, the lift that makes airplanes fly, the banana kick in football, and the spin ball in table tennis are all applications of Bernoulli's principle. The discovery of Bernoulli's principle is of great significance for human understanding of the characteristics and laws of fluids.
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- 0.9×0.6×1.16 0.9×0.6×1.16Overall Dimensions: 0.9×0.6×1.16 Brand: KexMall Model: PopsciCat-Medium-058 Materials: ①Base: 2.0mm cold-rolled steel plate, dimensions not less than 0.75×0.45×0.7m, surface baked paint (or electrostatic powder coating), reserved foot openings for later height adjustment and four-corner balance, reserved AC female socket position for power supply to electrical exhibits ②Tabletop: high-quality flame-retardant fiberglass material, total thickness with edge ≥100mm ③Instruction sign: acrylic UV high-precision printing, thickness ≥3mm ④Maintenance door: 2.0mm cold-rolled steel plate, surface baked paint (or electrostatic powder coating) ⑤U-shaped pipe: transparent acrylic tube ⑥Pipe elbow: transparent PVC Main Configuration: ①Electrical control: electrical logic control system, equipped with Guandao® K1 type PLC controller with protection specially for science exhibits ②Switching power supply: AC-DC S-60-12/24 input AC100-240V, 50/60Hz, output power 60W ③Button: self-resetting 22mm stainless steel metal button with ring light; LED voltage not higher than 12V to avoid high voltage leakage risk; mechanical life: 1 million times; protection level: IP67; protection method: waterproof. ④Fan: custom-made Energy Requirements: AC100-240V, 50/60Hz 200W (standard three-wire socket)
Operation: Press the "Start" button and observe the movement of the ball in the airflow. Function Overview: The exhibit consists of a vertical pipe, a horizontal U-shaped tube connected to it, a very light ball, and a fan. Press the button to start the fan, and you will see the ball moving along the airflow. When it reaches the upper end of the U-shaped tube, it obediently changes its vertical upward direction and enters the horizontal pipe. Why does the ball behave so obediently? According to Bernoulli's principle: the faster the fluid flow, the lower the pressure; the slower the flow, the higher the pressure. When the fan starts, the vertical upward airflow lifts the ball in the pipe and moves it upward along the center of the airflow. The vertical airflow creates a negative pressure in the U-shaped tube, with the lowest pressure at the lower end. When the ball reaches the upper end of the U-shaped tube, under the action of negative pressure, it obediently changes its vertical upward direction, is drawn into the horizontal pipe, and moves toward the lower end. In daily life, the lift that makes airplanes fly, the banana kick in football, and the spin ball in table tennis are all applications of Bernoulli's principle. The discovery of Bernoulli's principle is of great significance for human understanding of the characteristics and laws of fluids.