During strenuous exercise, it is possible to exert forces to the joints easily ten times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pain. Assume that the coefficient of kinetic friction in the joint is 0.015.
To determine the maximum force of friction under the given conditions, we can use the equation:
F_friction = coefficient of friction * normal force
In this case, the normal force can be calculated by multiplying the weight being supported by a factor of ten.
Let's assume the weight being supported is W.
Normal force = 10 * W
Now, we can calculate the maximum force of friction using the coefficient of kinetic friction:
F_friction = 0.015 * (10 * W)
Simplifying this equation:
F_friction = 0.15 * W
Therefore, the maximum force of friction under these conditions is 0.15 times the weight being supported.