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If 30N and 60N are applied to the right, then the resultant force is 90N to the right. If 40N is applied to the left and 30N applied to the right, the resultant force is 10N to the left as the force is bigger or heavier on the left. Note that "N" is an abbreviation of "Newton", which is a unit of force.
- Barron's How to Prepare for the ASVAB: Armed Services Vocational Aptitude, ed. Terry L. Duran (Hauppauge, NY: Barron's Educational Series, Inc., 2006), p. 94
- "Resultant forces". eSchooltoday in association with BusinessGhana.com. 2014. http://eschooltoday.com/science/forces/resultant-forces.html. Retrieved 25 July 2014. [dead link]