A ski that is placed on snow will stick to the snow. However, when the ski is moved along the snow, the rubbing warms and partially melts the snow, reducing the coefficient of kinetic friction and promoting sliding. Waxing the ski makes it water repellent and reduces friction with the resulting layer of water. A magazine reports that a new type of plastic ski is especially water repellent and that, on a gentle 210 m slope in the Alps, a skier reduced his top-to-bottom time from 61.0 s with standard skis to 43.0 s with the new skis. Determine the magnitude of his average acceleration with (a) the standard skis and (b) the new skis. Assuming a 3.40° slope, compute the coefficient of kinetic friction for (c) the standard skis and (d) the new skis. (a) Number 0.113 Units m/s^2

A ski that is placed on snow will stick to the snow. However, when the ski is moved along the snow, the rubbing warms and partially melts the snow, reducing the coefficient of kinetic friction and promoting sliding. Waxing the ski makes it water repellent and reduces friction with the resulting layer of water. A magazine reports that a new type of plastic ski is especially water repellent and that, on a gentle 210 m slope in the Alps, a skier reduced his top-to-bottom time from 61.0 s with standard skis to 43.0 s with the new skis. Determine the magnitude of his average acceleration with (a) the standard skis and (b) the new skis. Assuming a 3.40° slope, compute the coefficient of kinetic friction for (c) the standard skis and (d) the new skis. (a) Number 0.113 Units m/s^2

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 21.9OQ: Which of the assumptions below is not made in the kinetic theory of gases? (a) The number of...

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