Which Rolls Faster
Operation: Place the two wheels at the high ends of the two tracks respectively, then toggle 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 with different mass distributions. First, place the two wheels at the high ends of the two tracks respectively, then toggle 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, resulting in different moments of inertia. The closer an object's mass distribution is 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
- 0.9×0.6×1.08 0.9×0.6×1.08Overall Dimensions: 0.9×0.6×1.08 Brand: KexMall Model: PopsciCat-Medium-060 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 reinforced plastic, total thickness with edges ≥100mm ③Instruction plate: acrylic UV high-precision printing, thickness ≥3mm ④Maintenance door: 2.0mm cold-rolled steel plate, surface baked paint (or electrostatic powder coating) ⑤Tracks: transparent acrylic ⑥Release mechanism: 304 stainless steel ⑦Wheels: transparent acrylic + 304 stainless steel Power Requirement: None
Operation: Place the two wheels at the high ends of the two tracks respectively, then toggle 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 with different mass distributions. First, place the two wheels at the high ends of the two tracks respectively, then toggle 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, resulting in different moments of inertia. The closer an object's mass distribution is 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.