This interactive problem set is designed to help students recognize forces that are exerted in 11 common physical situations. For each situation, the student will decide which forces are present (P) or absent (A), then use a pull-down menu to view correct answers. This resource accompanies the four-part Physics Classroom tutorial, "Force and Its Representations" (see Related Materials for a link to the full tutorial.)
This self-assessment is part of The Physics Classroom tutorial collection.
force, force pairs, frictional force, gravitational force, normal force, spring force, tension force
Metadata instance created
September 27, 2011
by Caroline Hall
March 17, 2014
by Caroline Hall
Last Update when Cataloged:
November 18, 2010
AAAS Benchmark Alignments (2008 Version)
4. The Physical Setting
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.
Next Generation Science Standards
Disciplinary Core Ideas (K-12)
Forces and Motion (PS2.A)
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)
This resource is part of a Physics Front Topical Unit.
Topic: Dynamics: Forces and Motion Unit Title: Newton's Second Law & Net Force
It can be difficult for beginners to recognize different force interactions, especially since these concepts sometimes run counter to the student's intuition. This interactive assessment lets them practice in a self-directed environment. They view 11 common physical situations, then decide which forces are present. Afterward, they use a pull-down menu to view correct answers -- all accompanied by explanations.
%0 Electronic Source %A Henderson, Tom %D November 18, 2010 %T Physics Classroom: Recognizing Forces %V 2015 %N 27 February 2015 %8 November 18, 2010 %9 text/html %U http://www.physicsclassroom.com/morehelp/recforce/recforce.cfm
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