Agate is good protective energy stone, especially for children, and is very calming and soothing. It also can help strengthen the body's connection to the earth.
The friction factor, f, is a dimensionless factor that depends primarily on the velocity u, diameter D, density Ï, and viscosity Î·. It is also a function of wall roughness which depends on the size Îµ, spacing Îµ' and shape of the roughness elements characterized by Îµ''.
Equipment: An incline, a wooden block, a weight hanger, a set of slotted weights, a cord and pulley system, a sheet of graph paper, and a scientific calculator. Theory: The Coefficient of friction is defined as the ratio of force of friction to the normal force, Î¼ = F / N. Consider the following two cases (Figures).One is for static friction and the other for kinetic friction. At constant velocity to the Right, F = F k. On the verge of motion to the Right, F = Fs Î¼ k = Fk / N.ote that and consequently, If the externally applied force (F) is just equal to the force of static friction, Fs, then the object is on the verge of slipping, and the coefficient of friction involved is called the coefficient of static friction, Î¼s.