A primary force opposing motion on all faults is ____________.
A) magnetic attraction among iron-rich minerals
B) gravity
C) friction
D) van der Waals force

Question

Quizplus · Accepted Answer

The primary force opposing motion on all faults is friction. When two sides of a fault move in different directions, the irregularities and roughness of the surfaces rub against each other and resist the motion. This is similar to the resistance you feel when you try to slide a heavy object across a rough surface. While other forces like gravity and magnetic attraction may also be present, friction is the dominant force preventing motion on faults. Van der Waals force is not relevant in this context.

A Primary Force Opposing Motion on All Faults Is ____________