Newton's Third Law
★Exhibit Content: Action and Reaction Forces ★Interaction: Electromechanical Interaction ★Operation: 1. Feed the ball along the track into the model cannon, press the "Start" button; 2. Observe the model cannon launching the ball and the cannon body recoiling to hit the pendulum; 3. Observe the pendulum swing amplitude to understand the relationship between the swing amplitude and the reaction force on the cannon body. ★Exhibit Description: The action and reaction forces are equal in magnitude and opposite in direction. The exhibit consists of an air cannon, pendulum, ball, track, projectile recovery device, and platform. The air cannon, ball, and pendulum are arranged on a straight track with a 4-5 degree inclination. Driven by compressed air, the air cannon can shoot the ball horizontally at three different distances, selectable by the participant. When the cannon fires, it exerts an action force on the projectile; as the projectile moves forward, an equal and opposite reaction force causes the cannon body to move backward. The recoiling cannon body then hits the pendulum behind it, and the pendulum's swing amplitude indicates the magnitude of the reaction force on the cannon body. ★Scientific Principle: In classical mechanics, Newton's third law of motion states that when two bodies interact, they apply forces to each other of equal magnitude and opposite direction. Forces always occur in pairs: one force is called the "action force" and the other is called the "reaction force", also known as "resistance"; the two forces are equal in magnitude and opposite in direction. The distinction between them is purely arbitrary; any one force can be considered the action force, and its counterpart naturally becomes the accompanying reaction force. This pair of action and reaction forces is called a "paired force". Newton's third law originally described the relationship between action and reaction, namely: action equals reaction.
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- 1.6*0.7*1.45m 1.6*0.7*1.45mDimensions (unit: m): 1.6*0.7*1.45m Brand: KexMall Model: PopsciCat-mechanics-120 1. Materials: ① Platform: frame 2mm cold-rolled steel plate, enclosure 2.0mm cold-rolled steel plate with two-tone baked paint, rounded without sharp edges ② Tabletop: Kelaisi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Instruction sign: acrylic UV printing ④ Protective cover: transparent acrylic ⑥ Electrical control box: cold-rolled steel plate with baked paint, containing control circuit, switching power supply, circuit breaker, terminal blocks, etc. 2. Main Configuration: ① Demonstration frame: Q235-2mm sheet metal fabrication, surface baked paint ② Small cannon model: ABS/3D printed ③ Drive device: HF-PANDA silent air pump + control valve ④ Demonstration pendulum mechanism: Beijing Dingzhi DZ-50 stainless steel fixings + custom acrylic pendulum ⑤ Ball feeding track: bent stainless steel + fixing components ⑥ Ball: snooker ball ⑦ Buffer pad: PU soft padding ⑧ Electrical control: electrical logic control system, equipped with Guanjian® K2 type PLC controller with protection specially for science exhibits 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 300W ② Installation base: place directly ③ Entry passage: door frame dimensions (width × height) ≧1.0m×1.8m, continuous turning interval in passage ≧2.5m ④ Maintenance access: not required
★Exhibit Content: Action and Reaction Forces ★Interaction: Electromechanical Interaction ★Operation: 1. Feed the ball along the track into the model cannon, press the "Start" button; 2. Observe the model cannon launching the ball and the cannon body recoiling to hit the pendulum; 3. Observe the pendulum swing amplitude to understand the relationship between the swing amplitude and the reaction force on the cannon body. ★Exhibit Description: The action and reaction forces are equal in magnitude and opposite in direction. The exhibit consists of an air cannon, pendulum, ball, track, projectile recovery device, and platform. The air cannon, ball, and pendulum are arranged on a straight track with a 4-5 degree inclination. Driven by compressed air, the air cannon can shoot the ball horizontally at three different distances, selectable by the participant. When the cannon fires, it exerts an action force on the projectile; as the projectile moves forward, an equal and opposite reaction force causes the cannon body to move backward. The recoiling cannon body then hits the pendulum behind it, and the pendulum's swing amplitude indicates the magnitude of the reaction force on the cannon body. ★Scientific Principle: In classical mechanics, Newton's third law of motion states that when two bodies interact, they apply forces to each other of equal magnitude and opposite direction. Forces always occur in pairs: one force is called the "action force" and the other is called the "reaction force", also known as "resistance"; the two forces are equal in magnitude and opposite in direction. The distinction between them is purely arbitrary; any one force can be considered the action force, and its counterpart naturally becomes the accompanying reaction force. This pair of action and reaction forces is called a "paired force". Newton's third law originally described the relationship between action and reaction, namely: action equals reaction.
- 1.5*1.2*1.5m 1.5*1.2*1.5mDimensions (unit: m): 1.5*1.2*1.5m Brand: KexMall Model: PopsciCat-mechanics-121 1. Materials ① Platform: frame 2mm cold-rolled steel plate, enclosure 2.0mm cold-rolled steel plate, surface baked paint ② Tabletop: Kelaisi artificial stone, thickness ≥12mm, wear-resistant and easy to clean ③ Instruction sign: acrylic UV printing, printed with graphic science content and operation guide ④ Maintenance door: 2.0mm cold-rolled steel plate with baked paint, convenient for internal structure maintenance ⑤ Protective cover: transparent hemispherical acrylic ⑥ Recoil chamber: thickened engineering plastic shell, impact-resistant and long service life ⑦ Handwheel: 12mm transparent acrylic + 304 stainless steel 2. Main Configuration ① Recoil rotation assembly: freely rotatable metal guide tube, buffer limit components ② Matching balls for dropping: several wear-resistant special balls suitable for tube diameter ③ Control limit components: mechanical damping limit structure, controlling rotation amplitude to avoid excessive swinging 3. Installation Requirements ① Power requirement: no external power needed, purely mechanical operation ② Installation base: place the operation table horizontally directly, ensure the tabletop is stable ③ Entry passage: door frame dimensions (width × height) ≥1.0m×2.0m, continuous turning interval in passage ≥2.5m ④ Maintenance access: not required
★Exhibit Content: Interactive science demonstration of conservation of momentum, action and reaction forces, and recoil motion physical phenomena ★Interaction: Manual mechanical interaction ★Operation: 1. Rotate the handwheel to lift the ball into the recoil tube, observe the reverse motion of the device when the ball is ejected, and observe the form of force action between objects. ★Exhibit Description: This exhibit mainly consists of a transparent hemispherical protective cover, handwheel, lifting mechanism, rotatable recoil tube structure, tabletop cabinet, and balls for dropping. It intuitively demonstrates the recoil motion generated under Newton's third law. When a stationary object splits into two parts under internal forces, the two parts move in opposite directions. After the visitor drops the ball, the ball is ejected forward, and the device obtains a reverse recoil force causing a rotational action. This concretely presents life and industrial scenarios such as rocket launches and jet propulsion that follow the same principle. ★Scientific Principle: In classical mechanics, Newton's third law of motion states that when two bodies interact, they apply forces to each other of equal magnitude and opposite direction. Forces always occur in pairs: one force is called the "action force" and the other is called the "reaction force", also known as "resistance"; the two forces are equal in magnitude and opposite in direction. The distinction between them is purely arbitrary; any one force can be considered the action force, and its counterpart naturally becomes the accompanying reaction force. This pair of action and reaction forces is called a "paired force". Newton's third law originally described the relationship between action and reaction, namely: action equals reaction.
- Φ1.2*1.5m Φ1.2*1.5mDimensions (unit: m): Φ1.2*1.5m Brand: KexMall Model: PopsciCat-mechanics-122 1. Materials ① Platform: frame 2mm cold-rolled steel plate, enclosure 2.0mm cold-rolled steel plate, surface baked paint ② Tabletop: Kelaisi artificial stone, thickness ≥12mm, wear-resistant and easy to clean ③ Instruction sign: acrylic UV printing, printed with graphic science content and operation guide ④ Maintenance door: 2.0mm cold-rolled steel plate with baked paint, convenient for internal structure maintenance ⑤ Protective cover: transparent hemispherical acrylic ⑥ Recoil chamber: thickened engineering plastic orange shell, impact-resistant and long service life 2. Main Configuration ① Recoil rotation assembly: freely rotatable metal guide tube, buffer limit components ② Matching balls for dropping: several wear-resistant special balls suitable for tube diameter ③ Control limit components: mechanical damping limit structure, controlling rotation amplitude to avoid excessive swinging 3. Installation Requirements ① Power requirement: no external power needed, purely mechanical operation ② Installation base: place the operation table horizontally directly, ensure the tabletop is stable ③ Entry passage: door frame dimensions (width × height) ≥1.0m×2.0m, continuous turning interval in passage ≥2.5m ④ Maintenance access: not required
★Exhibit Content: Interactive science demonstration of conservation of momentum, action and reaction forces, and recoil motion physical phenomena ★Interaction: Manual mechanical interaction ★Operation: 1. Drop the ball into the recoil tube, observe the reverse motion of the device when the ball is ejected, and observe the form of force action between objects. ★Exhibit Description: This exhibit mainly consists of a transparent hemispherical protective cover, rotatable recoil tube structure, tabletop cabinet, and balls for dropping. It intuitively demonstrates the recoil motion generated under Newton's third law. When a stationary object splits into two parts under internal forces, the two parts move in opposite directions. After the visitor drops the ball, the ball is ejected forward, and the device obtains a reverse recoil force causing a rotational action. This concretely presents life and industrial scenarios such as rocket launches and jet propulsion that follow the same principle. ★Scientific Principle: In classical mechanics, Newton's third law of motion states that when two bodies interact, they apply forces to each other of equal magnitude and opposite direction. Forces always occur in pairs: one force is called the "action force" and the other is called the "reaction force", also known as "resistance"; the two forces are equal in magnitude and opposite in direction. The distinction between them is purely arbitrary; any one force can be considered the action force, and its counterpart naturally becomes the accompanying reaction force. This pair of action and reaction forces is called a "paired force". Newton's third law originally described the relationship between action and reaction, namely: action equals reaction.
Review
Principle Display: ★★ Interaction Effect: ★★★★ Ease of Installation: ★★★★★ Durability: ★★★ Overall Rating: ★★★