Thursday, 12 June 2014 12:41

## C6-11: SLIDING FRICTION - LECTURE TABLE AND FELT

• ID Code: C6-11
• Purpose: Show the effect on frictional force of velocity, normal force, and contact area.
• Description: The spring scale is connected by the rope to the friction block, which has one of its foam rubber-covered sides contacting the table. Pull with the rope parallel to the table so that the spring scale is visible to the class. Several features of frictional force are demonstrated as follows: (1) Static versus sliding friction, by slowly increasing the pulling force until the block begins to move. The force required to keep the block moving at a constant slow velocity is less than the force required to break the static friction and start the block in motion. (2) The frictional force doubles when a second block of equal mass is placed on the sliding block. (3) The frictional force is approximately independent of contact area, which can be demonstrated by turning the block so that it rests on the narrow felt surface and repeating experiment 1.
• Availability: Available
• Loc codes: C6
• #### C6-01 INCLINED PLANE - FRICTION BOX AND WEIGHTS

Shows that the coefficient of friction does not depend upon the mass of the object although the frictional force does. Read More
• #### C6-02: INCLINED PLANE - FRICTION BLOCK

Demonstrates that the coefficient of static friction is greater than the coefficient of sliding friction, and determines the coefficient of Read More
• #### C6-03: INCLINED PLANE - FRICTION WITH THREE BLOCKS

Illustrate different coefficients of friction. Read More
• #### C6-04: FRICTION DIRECTION ON INCLINED PLANE

Determine the direction of the frictional force in a possibly ambiguous situation. Read More
• #### C6-05: AIR TRACK - INCLINED PLANE FRICTION

Show that the force of friction depends upon the conditions of the surfaces in contact. Read More
• #### C6-11: SLIDING FRICTION - LECTURE TABLE AND FELT

Show the effect on frictional force of velocity, normal force, and contact area. Read More
• #### C6-12: SKIDDING AUTOMOBILE

Demonstrate the effect of locked wheels on vehicle stability. Read More
• #### C6-13: FRICTION BETWEEN GLASS SURFACES

Demonstrate the increase of friction between two glass surfaces when lubricating surface films are removed. Read More
• #### C6-14: SOCIAL CLIMBER

Illustrate frictional forces in a weird way. Read More
• #### C6-15: SOCIAL DESCENDER - FRICTION TOY

Illustrate frictional forces in a weird way. Read More
• #### C6-16: SLIDING AND STATIC FRICTION

Show that the friction force depends linearly on the normal component of the applied force. Read More
• #### C6-17: FRICTION VS. PULLING ANGLE

Demonstrate how pulling angle affects the frictional force Read More
• #### C6-21: SUSPENDED ROD ON WATER

An elementary problem involving horizontal friction. Read More
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