The Sliding Down an Incline Plane model shows a stone block is lying on an inclined plane. Initially, the component of gravity along the plane surface, Ft, is compensated by the force of static friction Fsf, which is proportional to the normal to the plane, N. Because the modulus of this force cannot exceed a limit value of ?|N| (? is the static friction coefficient between the block and the plane). When the user increases the slope of the plane by dragging the double arrow at the plane top, Ft ends up being larger than this limit and the block slides down the plane
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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.
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.
11. Common Themes
6-8: 11B/M2. Mathematical models can be displayed on a computer and then modified to see what happens.
AAAS Benchmark Alignments (1993 Version)
4. THE PHYSICAL SETTING
E. Energy Transformations
4E (9-12) #1. Whenever the amount of energy in one place or form diminishes, the amount in other places or forms increases by the same amount.
4F (6-8) #3. An unbalanced force acting on an object changes its speed or direction of motion, or both. If the force acts toward a single center, the object's path may curve into an orbit around the center.
%0 Computer Program %A Esquembre, Francisco %D April 15, 2010 %T Sliding Down an Incline Plane Model %7 1.0 %8 April 15, 2010 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9973&DocID=1594
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This interactive tutorial from The Physics Classroom collection offers extensive content support on how to determine the net force acting on an object on an inclined plane. It includes problems in which friction is present. Abundant use of free-body diagrams helps with visualization.