coefficients of friction

Materials μs Steel, steel 0.58 Steel, Brass 0.35 Glass, glass 1.00 Wood, wood 0.35 Wood, metal 0.40 Ice, ice 1.10 Copper, copper 1.60 Teflon, Teflon 0.04 Rubber tyre, dry concrete road 1.0 Rubber tyre, wet concrete road 0.7 ..

When you push a wooden block on a smooth steel sheet it is easy, in case of a wooden sheet it is more difficult, but when you push it on a road it becomes quite difficult. There must be greater interlocking on the road with the block and least interlocking on the steel sheet with the block. This i..

= coefficient of rolling friction R = normal reaction r = radius of rolling body This equation is applicable only for pure rolling and no sliding. It also must be noted that the coefficient of rolling friction, m r , has the dimensions of leng..

The tangent of the angle of friction is equal to the coefficient of static friction..

An oscillator, in actual practice, almost always lies in a resisting medium, like air, oil etc., where part of its energy is dissipated in overcoming the opposing frictional or viscous forces and its amplitude, therefore, goes on decreasing progressively. Such forces, which are non-conse..

Use of alloys on moving and sliding parts reduces friction because alloys have a low coefficient of friction..

Conservative Forces and Non-Conservative Forces - Let us consider two situations Suppose a block of mass 'm' rests on a rough horizontal table. It is dragged horizontally towards right through a distance 'l', and back to its initial position. Let ' m ' be the coefficient of frictionh..

Motion of a Car on a Circular Level Road - When vehicles go through turnings, they travel along a nearly circular arc. There must be some force which will produce the required acceleration. If the vehicles go in a horizontal circular path, this resultant force is also horizontal. Consider the situa..