Final answer:
To determine the coefficient of friction for a granite block sliding on concrete, use the kinetic friction force and the normal force. The coefficient of kinetic friction is calculated with the formula μ_k = f_k/N. The required forces are the applied (frictional) force and the gravitational (normal) force.
Step-by-step explanation:
To determine the coefficient of friction for the granite block on the concrete, you can use the normal force and the frictional force. Since the block is being moved at a constant speed, the frictional force is equal to the force being applied to it. In this case, the frictional force is opposite the direction of the applied force but equal in magnitude, indicating the forces are balanced.
In physics, the formula for calculating the coefficient of kinetic friction (μ_k) is given by μ_k = f_k/N, where f_k is the kinetic friction force, and N is the normal force. From the information provided, the kinetic friction force is equal to the force applied to move the block, and the normal force is equal to the gravitational force, assuming no other vertical forces act on the block.
Thus, if the applied force is known and equal to the frictional force, and the normal force is the weight of the block (gravitational force), these values can be substituted into the formula to find the coefficient of kinetic friction.