Sliding speed and ice temperature affect the surface friction of ice more than had previously been thought. The thermodynamic model developed by VTT Technical Research Centre of Finland research scientists shows that under certain conditions ice warms and melts when an item of material slides across its surface. The ice then becomes more slippery. Conversely, the friction coefficient can rise a hundredfold when sliding speed reduces and the temperature drops. Among other potential uses, the model can be employed in developing road and runway maintenance, and tyres, footwear or winter sports equipment.
from Phys.org: Physics News http://ift.tt/1h2VUBR