Question

the force of friction exerted by a surface depends on a. the color of the surface b. the temperature of the surface c. the hardness of the surface d. the smoothness of the surface

Explanation:

Friction is a force that resists relative motion between two surfaces in contact. The main factor among the options that affects the frictional force is the smoothness of the surface. Rougher surfaces (less smooth) generally have higher frictional forces, while smoother surfaces have lower frictional forces. Color, temperature, and hardness do not directly determine the frictional force in the way that smoothness does.

Answer:

D. The smoothness of the surface