Question

1. often, frictional forces are not desirable. cite a case where frictional forces are desirable and explain why. (do not use the case cited below)

Explanation:

Walking is a case where frictional force is desirable. When we walk, the friction between our feet and the ground allows us to push against the ground and move forward. Without friction, our feet would slip and we would not be able to walk properly.

Answer:

Walking. Friction between feet and ground enables forward - movement.