Measure the coefficient of static friction between an object of your choosing and a flat surface such as a desktop, table, or wooden board.You'll need to know the mass of the object and to apply a known force parallel to the surface. One way to apply a force is by using a rope (run the rope horizontally over to a pulley and then hang a known mass off the edge of the table at the other end of the rope). Another way would be to incline the surface and use the parallel component of the object's weight to overcome the frictional force. Other techniques for applying and measuring forces are of course possible.Either way, measure the minimum force needed to start the object moving and compare this to the normal force to get the coefficient of friction.As with all experiments, pay close attention to uncertainties. Measure as carefully as possible and discuss how you arranged the apparatus to minimize experimental uncertainty.