By Leif Torgersen
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Extra info for Good glide : the science of ski waxing
The If a solid object slides on a hard surface, contact to is limited a few points. Between these points, air or other materials separate the object and the underlying surface. The total area of the contact points small that it really is so does not de- pend on the area of the surfaces involved. The total contact area depends more directly on the relative hardness tacting materials of the two con- and on the weight of the sliding object. The number of contact points increases with increasing weight.
S type of is achieved by sup plying lubncabng hqurt. uauDy through an oi hole movement causes aeparaaon of In lubrication UMd 28 Good Glide the moving parts. Replacement of lubricating liquid pressed to and depend on how surfaces. Properties characteristics the side can also occur through the force between the surfaces the sliding object being at an is angle to the underlying surface, most such as a sailboat closest to liquid sliding through water. will on snow and Friction But because friction Pure it is it is of more complex neither pure dry nor pure liquid friction.
The total area of the contact points small that it really is so does not de- pend on the area of the surfaces involved. The total contact area depends more directly on the relative hardness tacting materials of the two con- and on the weight of the sliding object. The number of contact points increases with increasing weight. The total area of the contact points determines the magnitude of the friction. Friction then creases with and is in- proportional Friction to weight over a range of weights, relatively large which agrees \ct related to the internal friction.