Part 1.Rubber on Concrete . In this section, you will measure the peak static friction force and the kinetic friction force as a function of the normal force on the block. In each run, you will pull the block as before, but by changing the masses on the block, you will vary the normal force on the block. 1.Select the surface rubber on concrete. 2. Select mass of smallest value. 3. Click start and determine what is the value of static friction, fill out the value in data table 1A and kinetic friction in data table 1B. 4. Change the mass to next five values and fill out the corresponding values of static and kinetic friction