Using this model, we solve for both the quasistatic and dynamic response as a function of excitation frequency and complex compliance using an electrical analog for the mechanical system. Earlier work did not find correct solutions for the amplitude and phase, did not examine the influence of finite stiffness in the head of the MPN, and overlooked the difference between a partial and full derivative and its influence on quasistatically acquired force curves. The equations here will allow scientists to correctly interpret their results concerning elastic and anelastic materials response, especially for low modulus, high damping samples such as polymers. That's against the natural angle of the fur, and it feels more difficult to do. Most cats don't like the extra friction between your hand and their fur.
Friction is the force between two things that opposes their motion.
Scientists want to know all they can about friction. In our laboratory at the Swiss Federal Institute of Technology in Lausanne, we are learning a little more about it. O.P. Behrend, L. Odoni, J.L. Loubet and N.A. Burnham, Appl. Phase images acquired while intermittently contacting a sample surface with the tip of an atomic force microscope cantilever are not easy to relate to material properties. We have simulated dynamic force curves and compared simulated with experimental results.