Question

A force applied to a system from the outside the system, the most common of which are weight, support or normal force, friction and fluid resistance.

Answer 1

An external force is a force acting on a system from outside the system. It is distinguished from internal forces, which act between components within the system. Examples of external forces include weight, friction, and fluid resistance.

Step-by-step explanation:

An external force is a force acting on a system from outside the system. It is distinguished from internal forces, which act between components within the system. In physics, Newton's second law of motion states that the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. Examples of external forces include weight, friction, and fluid resistance.