If material is to move downslope, it must overcome the force of
A) friction.
B) the cohesion of particles to each other.
C) inertial resistance of the material.
D) all of these

Question

Quizplus · Accepted Answer

All three forces, friction, cohesion, and inertial resistance, contribute to material movement downslope. Frictional force opposes the movement of the material while cohesion hinders the individual particles from separating. Inertial resistance resists the acceleration of the material. Therefore, to move downslope, the material must overcome all of these forces.

If Material Is to Move Downslope, It Must Overcome the Force