This interactive problem set is designed to help students recognize forces that are exerted in 11 common physical situations. For each situation, the user will decide which forces are present (P) or absent (A), then use a pull-down menu to view correct answers.
This self-assessment is part of The Physics Classroom tutorial collection.
6-8: 4F/M3a. An unbalanced force acting on an object changes its speed or direction of motion, or both.
9-12: 4F/H7. In most familiar situations, frictional forces complicate the description of motion, although the basic principles still apply.
4G. Forces of Nature
6-8: 4G/M1. Every object exerts gravitational force on every other object. The force depends on how much mass the objects have and on how far apart they are. The force is hard to detect unless at least one of the objects has a lot of mass.
%0 Electronic Source %A Henderson, Tom %D November 18, 2010 %T Physics Classroom: Recognizing Forces %V 2014 %N 9 March 2014 %8 November 18, 2010 %9 text/html %U http://www.physicsclassroom.com/morehelp/recforce/recforce.cfm
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