May 24, 2020 · Correlation shows the strength of a relationship between two variables and is expressed numerically by the correlation coefficient. The correlation coefficient's values range between -1.0 and 1.0.

How does the coefficient of friction depend upon the area of contact explain

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  • An easy way to measure the coefficient of static friction is to place two objects together and then tilt them until the top one slides. The angle at which one object starts to slip on the other is directly related to the coefficient. When the two objects are horizontal there is no frictional force.

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    heat; energy. How does water on a road surface affect tire friction? adds to normal dry friction increases or decreases friction depending A cable capable of pulling 4,500 N snapped while trying to drag a 20,000 N compressor across the street. The coefficient of static friction must be _____.

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    An ultra-low friction coefficient of 0.004 was obtained under a very high contact pressure, with a virgin contact pressure up to 2.57 GPa. Related experiments have indicated that the load, sliding speed, and humidity of the test environment can affect superlubricity to some degree, so we tested variations in these conditions. May 24, 2020 · Correlation shows the strength of a relationship between two variables and is expressed numerically by the correlation coefficient. The correlation coefficient's values range between -1.0 and 1.0. Properties of the Friction Force : 1. acts in a direction opposite the direction of motion. 2. The magnitude of is given by = m N where m is called the coefficient of friction and N is the normal force discussed previously. 3. m is a number having no dimension in the range 0§mb1. m depends upon the materials involved. 4.

  • The friction due to air is often called Air resistance differs from the friction between solid surfaces. Air resistance depends on surface area and the speed of an object in the following ways: •An object with a larger surface area comes into contact with more molecules as it moves than an object with a smaller surface area.

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  • An easy way to measure the coefficient of static friction is to place two objects together and then tilt them until the top one slides. The angle at which one object starts to slip on the other is directly related to the coefficient. When the two objects are horizontal there is no frictional force.

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    The four types of friction and how they act on objects.

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    Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth. Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits)...