Force

In physics, a force is an external cause responsible for any change of a physical system. For instance, a person holding a dog by a rope is experiencing the force applied by the rope on his hand, and the cause for its pulling forward is the force exercised by the rope. The kinetic expression of this change is, according to Newton's second law, acceleration, non kinetic expressions such as deformation can also occur. The SI unit for force is the newton.

References

• {{Book reference | Author=Halliday, David; Robert Resnick; Kenneth S. Krane | Title=Physics v. 1 | Publisher=New York: John Wiley & Sons | Year=2001 | ID=ISBN 0471320579}}
• {{Book reference | Author=Serway, Raymond A. | Title=Physics for Scientists and Engineers | Publisher=Philadelphia: Saunders College Publishing | Year=2003 | ID=ISBN 0534408427}}
• {{Book reference | Author=Tipler, Paul | Title=Physics for Scientists and Engineers: Mechanics, Oscillations and Waves, Thermodynamics (5th ed.) | Publisher=W. H. Freeman | Year=2004 | ID=ISBN 0716708094}}