Rolling resistance: Difference between revisions
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'''Rolling resistance''', also called '''rolling friction''' and '''rolling drag''' is a force of resistance that slows down a rolling motion of one body against another. In other words, it is a force that opposes | '''Rolling resistance''', also called '''rolling friction''' and '''rolling drag''' is a force of resistance that slows down a rolling motion of one body against another. In other words, it is a force that opposes the tendency of one body to roll against each other. | ||
==Important facts about rolling friction== | ==Important facts about rolling friction== | ||
* For rolling resistance to operate, it is not necessary that the two bodies be rolling against each other. In fact, rolling resistance operates even when two bodies are sliding against each other. However, this is negligible compared to the (kinetic) [[ | * For rolling resistance to operate, it is not necessary that the two bodies be rolling against each other. In fact, rolling resistance operates even when two bodies are sliding against each other. However, this is negligible compared to the (kinetic) [[friction]] acting between the bodies, so is usually ignored. | ||
* Rolling friction operates primarily because of deformations at a microscopic level between the surfaces of contact. | * Rolling friction operates primarily because of deformations at a microscopic level between the surfaces of contact. | ||
* The amount of rolling friction between two bodies depends on a number of complicated factors, including the nature of the surfaces in contact, the [[normal force]] between the two surfaces, and the overall geometry of the bodies. | * The amount of rolling friction between two bodies depends on a number of complicated factors, including the nature of the surfaces in contact, the [[normal force]] between the two surfaces, and the overall geometry of the bodies. | ||
Revision as of 14:41, 3 April 2010
Rolling resistance, also called rolling friction and rolling drag is a force of resistance that slows down a rolling motion of one body against another. In other words, it is a force that opposes the tendency of one body to roll against each other.
Important facts about rolling friction
- For rolling resistance to operate, it is not necessary that the two bodies be rolling against each other. In fact, rolling resistance operates even when two bodies are sliding against each other. However, this is negligible compared to the (kinetic) friction acting between the bodies, so is usually ignored.
- Rolling friction operates primarily because of deformations at a microscopic level between the surfaces of contact.
- The amount of rolling friction between two bodies depends on a number of complicated factors, including the nature of the surfaces in contact, the normal force between the two surfaces, and the overall geometry of the bodies.