Which Falls First? (Free Fall)
★Exhibit Content: Vacuum, Gravity ★Interaction: Electromechanical Interaction ★Operation: Visitors press the button to rotate the transparent tube; observe the entire process of the ball and feather falling. ★Exhibit Description: The exhibit simulates two different falling environments, one containing air and the other in a vacuum. Visitors rotate the tubes to make the feather and ball fall simultaneously, and observe the relationship between the falling time of the feather and the environment. ★Scientific Principle: An object that falls without any resistance and only under the action of gravity is called 'free fall'. For example, an object that starts falling from rest under the Earth's gravity. The space near the Earth's surface can be regarded as a uniform gravitational field. If air resistance is not considered, the free fall motion in this region is uniformly accelerated linear motion. The motion of a conventional object under only gravity with zero initial velocity is called free fall motion. Free fall motion is an idealized physical model. The speed of free fall is independent of the object's mass, so in a vacuum, a feather and an iron ball fall at the same speed.
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- 2.0*1.4*2.0m 2.0*1.4*2.0mDimensions (unit: m): 2.0*1.4*2.0m Brand: KexMall Model: PopsciCat-mechanics-117 1. Materials: ① Exhibit stand, base frame: 25 square tube, 30 square tube, 40 square tube, 2.0mm cold-rolled steel panel, surface baked enamel ② Control console top: Kelestone artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Description plate, graphic panel: acrylic UV printing ④ Maintenance door: 2.0mm cold-rolled steel panel with baked enamel ⑤ Vacuum tube: high-transparency acrylic tube ⑥ Electrical control box: cold-rolled steel baked enamel box, containing control circuit, switching power supply, circuit breaker, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjin® K2 type PLC controller with protection specially for science exhibits ② Button: self-resetting 22mm stainless steel metal button with ring light ③ Vacuum pump: HF-PANDA high-speed silent electric pump ④ Power unit: Beijing Dingzhi DZ-1000 gear motor + transmission components ⑤ Rotating mechanism: sheet metal baked enamel shape + stainless steel mounting bracket + rotating components ⑥ Control system: Tanxingmao® electromagnet + vacuum pump and control valve system 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 300W (standard three-wire socket) ② Installation foundation: direct placement + wall anti-tip fixation ③ Entry passage: door frame size (width × height) ≧1.2m×2.0m, continuous turning interval in passage ≧1.5m ④ Maintenance access: not required
★Exhibit Content: Vacuum, Gravity ★Interaction: Electromechanical Interaction ★Operation: Visitors press the button to rotate the transparent tube; observe the entire process of the ball and feather falling. ★Exhibit Description: The exhibit simulates two different falling environments, one containing air and the other in a vacuum. Visitors rotate the tubes to make the feather and ball fall simultaneously, and observe the relationship between the falling time of the feather and the environment. ★Scientific Principle: An object that falls without any resistance and only under the action of gravity is called 'free fall'. For example, an object that starts falling from rest under the Earth's gravity. The space near the Earth's surface can be regarded as a uniform gravitational field. If air resistance is not considered, the free fall motion in this region is uniformly accelerated linear motion. The motion of a conventional object under only gravity with zero initial velocity is called free fall motion. Free fall motion is an idealized physical model. The speed of free fall is independent of the object's mass, so in a vacuum, a feather and an iron ball fall at the same speed.
Review
Principle Display: ★★★★★ Interaction Effect: ★★★ Ease of Installation: ★★★ Durability: ★★★ Overall Rating: ★★★