Task 4: Type of Material and the Coefficients of Friction The data in the Table II were gathered using a force meter pulling horizontally on a block of wood placed on a level flat surface, but for the second part of this experiment the surface was not always made of wood. The same set-up was used as before, but this time, the mass remained the same and the material in contact with the wooden block was changed to wood, plastic, rubber, or leather. Since the mass remained the same, any change in the data reflects only the effect of each material. Both the maximum force of static friction and force of kinetic friction were measured to determine if the types of materials have any effect on the coefficients of friction. The diagram below shows the experimental set-up for the second part of this experiment, where the forward direction is to the right. The parameter being controlled in this part of the experiment is the mass of the wood. The variable being manipulated is the nature of the surface over which the wood is being pulled. The variables being measured are the forces of friction, the parameters being tested are the coefficients of friction. Type of material Force sensor is changed Force of friction drags String Applied force Wood surface Once again, the maximum static friction is defined as the largest recorded reading on the force sensor before the block starts moving; the kinetic friction is defined as the force, as measured on the force sensor, that causes the block to move at a constant velocity.Table II: Type of Surface and Friction Date Total mass [kg] [wood blook plus masses on top] Type of surface material Trsstmsnt: Complete the table. Analysis: List the surfaces in order from smoothest [lowest friction] to roughest [highest fliotion}