In physics, net force is the overall force acting on an object. In order to perform this calculation the body is isolated and interactions with the environment or constraints are introduced as forces and torques forming a free-body diagram.
The net force does not have the same effect on the movement of the object as the original system forces, unless the point of application of the net force and an associated torque are determined so that they form the resultant force and torque. It is always possible to determine the torque associated with a point of application of a net force so that it maintains the movement of the object under the original system of forces.
With its associated torque, the net force becomes the resultant force and has the same effect on the rotational motion of the object as all actual forces taken together. It is possible for a system of forces to define a torque-free resultant force. In this case, the net force when applied at the proper line of action has the same affect on the body as all of the forces at their points of application. It is not always possible to find a torque-free resultant force.
Read more about Net Force: Total Force, Parallelogram Rule For The Addition of Forces, Resultant Force, Usage
Famous quotes containing the words net and/or force:
“There is a potential 4-6 percentage point net gain for the President [George Bush] by replacing Dan Quayle on the ticket with someone of neutral stature.”
—Mary Matalin, U.S. Republican political advisor, author, and James Carville b. 1946, U.S. Democratic political advisor, author. All’s Fair: Love, War, and Running for President, p. 205, Random House (1994)
“Science is unflinchingly deterministic, and it has begun to force its determinism into morals. On some shining tomorrow a psychoanalyst may be put into the box to prove that perjury is simply a compulsion neurosis, like beating time with the foot at a concert or counting the lampposts along the highway.”
—H.L. (Henry Lewis)