This webpage provides a detailed introduction to Force and its meaning. This is one of the sections of the tutorial on Newton's Laws and Forces. Emphasis is laid on the basic understanding of Force as a vector quantity.
The descriptions are supplemented by classic examples of forces in our day to day lives. The website also defines the unit of force, Newton. An introduction to free body diagrams are also provided, where balanced and unbalanced forces are briefly discussed.
This item is part of The Physics Classroom, a comprehensive set of tutorials and multimedia resources for high school physics.
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6-8: 4F/M3a. An unbalanced force acting on an object changes its speed or direction of motion, or both.
9-12: 4F/H1. The change in motion (direction or speed) of an object is proportional to the applied force and inversely proportional to the mass.
9-12: 4F/H4. Whenever one thing exerts a force on another, an equal amount of force is exerted back on it.
9-12: 4F/H7. In most familiar situations, frictional forces complicate the description of motion, although the basic principles still apply.
9-12: 4F/H8. Any object maintains a constant speed and direction of motion unless an unbalanced outside force acts on it.
9. The Mathematical World
9B. Symbolic Relationships
9-12: 9B/H4. Tables, graphs, and symbols are alternative ways of representing data and relationships that can be translated from one to another.
Next Generation Science Standards
Disciplinary Core Ideas (K-12)
Forces and Motion (PS2.A)
For any pair of interacting objects, the force exerted by the first object on the second object is equal in strength to the force that the second object exerts on the first, but in the opposite direction (Newton's third law). (6-8)
The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change. The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion. (6-8)
Newton's second law accurately predicts changes in the motion of macroscopic objects. (9-12)
%0 Electronic Source %A Henderson, Tom %D July 1, 2011 %T Physics Classroom: Force and Its Representation %V 2015 %N 18 April 2015 %8 July 1, 2011 %9 text/html %U http://www.physicsclassroom.com/Class/newtlaws/u2l2a.cfm
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