The city is using sand trucks to place sand in the road during icy conditions. which best explains the use of sand? a. the sand increases friction by increasing surface area b. the sand increases friction by increasing roughness c. the sand decreases friction by increasing surface area d. the sand decreases friction by increasing roughness.

Its B im 100% correct

The correct option is b.

Explanation:

In the given problem, the city is using sand trucks to place sand in the road during icy conditions.

Sand is used during icy condition. As it increases the friction by increasing the roughness. It can help in preventing an accident in icy condition.

The grains of the sand scrub the surface of the ice.

Therefore, the use of sand increases friction by increasing roughness.