A time-honored trick method for approximately locating the midpoint of a long uniform rod or bar...

A time-honored trick method for approximately locating the midpoint of a long uniform rod or bar is to support it horizontally at any two arbitrary points on one's index fingers and then move the fingers together. (Of course, just finding its balance point on one finger alone works very well, too!) Explain the workings of the trick method, using your knowledge of the basic principles of static equilibrium and a property of frictional forces: that they have a maximum value equal to a constant μ (the coefficient of friction) times the component of force normal to the surface of contact between two objects.

Expert Solution

Solution:

Thus we found that the maximum value of static friction experianced at approximate mid point of a uniform rod using time-honored trick method is μ (the coefficient of friction) times the component of force normal to the surface of contact between two objects.

genius_generous answered 2 years ago

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