query: Why is it that friction apparently decreases with speed?
positive_passages.docid: 11877
positive_passages.text: Does the force of kinetic friction increase with the relative speed of the objects involved? If not, why not?
negative_passages.docid: 83112
negative_passages.text: Does the contact area affect friction forces?
negative_passages.docid: 148945
negative_passages.text: Is the coefficient of friction always less than unity?
negative_passages.docid: 101527
negative_passages.text: Why is it that a force is not required for a body to move at constant velocity?
negative_passages.docid: 38843
negative_passages.text: Why are there both Static and Kinetic Friction?
negative_passages.docid: 102884
negative_passages.text: The direction of static friction?
negative_passages.docid: 43981
negative_passages.text: Direction of friction on particle placed on a rotating turntable
negative_passages.docid: 45613
negative_passages.text: Conservation of energy when slowing an object down
negative_passages.docid: 147778
negative_passages.text: How can static friction do work?
negative_passages.docid: 62362
negative_passages.text: Friction during pure rotation
negative_passages.docid: 97971
negative_passages.text: Why does a plane look like it's slower than a car?
negative_passages.docid: 135873
negative_passages.text: Is friction a conservative force?
negative_passages.docid: 54431
negative_passages.text: Car Motion using Tire Friction
negative_passages.docid: 27184
negative_passages.text: Is work done in rolling friction?
negative_passages.docid: 6536
negative_passages.text: After what speed air friction starts to heat up an object?
negative_passages.docid: 55422
negative_passages.text: Directions of static & kinetic friction?
negative_passages.docid: 31837
negative_passages.text: Why does Newton's Third Law actually work?