Bennett Mechanical Comprehension Practice Test 2025 - Free Practice Questions and Review Guide

Static friction is the term that describes the force that helps maintain the position of an object at rest. This force acts between two surfaces in contact and prevents the object from moving when an external force is applied. It counteracts any small forces trying to cause motion, effectively stabilizing the object in its position.

When an object is stationary, static friction acts to resist any applied force up to a maximum limit, which is defined by the coefficient of static friction and the normal force acting on the object. This allows the object to remain at rest until the applied force exceeds this threshold. Understanding static friction is essential in mechanics, as it's a fundamental concept that explains why objects do not immediately move when a force is applied.

In contrast, kinetic friction refers to the frictional force opposing the motion of two surfaces sliding past each other, while dynamic resistance typically relates to the opposition faced by an object in motion. Static load refers to the weight or force transmitted through a structure or component that remains unchanged over time, but it does not specifically cover the forces acting to keep an object at rest.