Which Rolls Faster
Operation: Place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Function Overview: The exhibit consists of a lever, two tracks of the same length and inclination angle, and two circular wheels of the same size and equal mass but different mass distribution. First, place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Scientific Principle: Upon careful observation, you will find that the wheel with mass distributed closer to the axis of rotation rolls faster. Why is that? The reason lies in the different mass distributions of the two wheels, which result in different moments of inertia. The closer an object's mass is distributed to the axis of rotation, the smaller its moment of inertia, and the easier it is to change its state of rotation. Therefore, as the two wheels roll down the tracks from rest, the wheel with the smaller moment of inertia rolls faster than the wheel with the larger moment of inertia. The moment of inertia is an important parameter in scientific experiments, engineering technology, aerospace, electric power, machinery, instrumentation, and other industrial fields.
Options
- China Science and Technology Museum Standard Edition CSTM Standard EditionDimensions (unit: m): 0.75×0.68×1.08 Brand: KexMall Model: PopsciCat-Mobile-072 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Tracks: transparent acrylic ⑥ Release mechanism: 304 stainless steel ⑦ Wheels: transparent acrylic + 304 stainless steel 2. Main configuration: none 3. Energy requirement: none
Operation: Place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Function Overview: The exhibit consists of a lever, two tracks of the same length and inclination angle, and two circular wheels of the same size and equal mass but different mass distribution. First, place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Scientific Principle: Upon careful observation, you will find that the wheel with mass distributed closer to the axis of rotation rolls faster. Why is that? The reason lies in the different mass distributions of the two wheels, which result in different moments of inertia. The closer an object's mass is distributed to the axis of rotation, the smaller its moment of inertia, and the easier it is to change its state of rotation. Therefore, as the two wheels roll down the tracks from rest, the wheel with the smaller moment of inertia rolls faster than the wheel with the larger moment of inertia. The moment of inertia is an important parameter in scientific experiments, engineering technology, aerospace, electric power, machinery, instrumentation, and other industrial fields.
- Optimized Popular Edition Optimized EditionDimensions (unit: m): 0.75×0.68×1.08 Brand: KexMall Model: PopsciCat-Mobile-072 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Tracks: transparent acrylic ⑥ Release mechanism: 304 stainless steel ⑦ Wheels: transparent acrylic + 304 stainless steel 2. Main configuration: none 3. Energy requirement: none
Operation: Place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Function Overview: The exhibit consists of a lever, two tracks of the same length and inclination angle, and two circular wheels of the same size and equal mass but different mass distribution. First, place the two wheels at the high ends of the two tracks respectively, then push the lever so that both wheels roll down simultaneously. Guess which wheel rolls faster? Scientific Principle: Upon careful observation, you will find that the wheel with mass distributed closer to the axis of rotation rolls faster. Why is that? The reason lies in the different mass distributions of the two wheels, which result in different moments of inertia. The closer an object's mass is distributed to the axis of rotation, the smaller its moment of inertia, and the easier it is to change its state of rotation. Therefore, as the two wheels roll down the tracks from rest, the wheel with the smaller moment of inertia rolls faster than the wheel with the larger moment of inertia. The moment of inertia is an important parameter in scientific experiments, engineering technology, aerospace, electric power, machinery, instrumentation, and other industrial fields.