What is the average friction force when a person has a usual 1 km walk?

The friction force is necessary for a person to walk on the surface. When a person walks, his/her shoes comes in contact with the surface of road or floor. Since, he/she doesn’t slip on the surface, it implies that the frictional force is less than the maximum/limiting friction force.

Now, to calculate the amount of friction force a person experience in a walk of 1km, let us



suppose that the mass of the person’s body is m and the static friction coefficient of road is μ.


The weight of the body= mg


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