Applied Mathematics 1413 Lecture Notes - Lecture 3: Strong Interaction, Net Force, Resultant Force
2 Feb 2015
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Document Summary
A force is defined by the interaction between separate objects. The term force is used to describe and measure an interaction. There are contact forces (friction) and contact-free forces (gravity) There are 4 fundamental forces: gravity, electromagnetics, strong nuclear force, weak nuclear forces. These forces are contact-free forces, also known as field forces. All forces we deal with daily (excluding gravity) are convenience forces, such as tension, normal, or muscle forces. Muscle tissues are distinguished based on their structural differences and functional purposes. Skeletal muscles are attached to bones and control skeletal movement, smooth muscles surround abdominal organs and blood vessels, and cardiac muscles that operate the heart. In simple terms, a force is a push or a pull exerted on an object. After you release it, there is no interaction between you and the ball, when it makes contact with the wall there is an interaction. If there is no contact, there will be no forces exerted.
