Difference between revisions of "Friction Block"

From UO Physics Demonstration Catalog
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{{NewDemo|subject=Mechanics|topic=Newton's Laws|file1=Fancart.gif}}
{{NewDemo|subject=Mechanics|topic=Newton's Laws|file1=Friction_Blocks.gif}}


A dynamic cart has a fan attached to it. The fan provides a force which accelerates the cart. Mass can be added which causes the cart's acceleration to be decreased. Force can be changed by a two speed switch for the fan. Can be demonstrated qualitatively or a computer with a motion detector or photogates can be used for quantitative analysis.
Place masses on a wooden block and pull the block with a spring scale. A larger force is needed to get the block moving (static vs. kinetic friction). Add mass to show friction is dependant on the normal force. One block the center is hollowed out to show that friction is independent of contact surface area. Blocks with foam rubber and a rubber sheet are available to vary the coefficient of static friction.


'''Location:'''
'''Location:'''
*Fan Carts: Sh. C-1
*Blocks: Dr. 4
*Dynamic Cart Track: Sh. C-0
*Masses: Sh. A-4
*Spring Scales: Dr. 10

Revision as of 09:58, 6 April 2022

Return to Newton's Laws

Friction Blocks.gif

Description:

Place masses on a wooden block and pull the block with a spring scale. A larger force is needed to get the block moving (static vs. kinetic friction). Add mass to show friction is dependant on the normal force. One block the center is hollowed out to show that friction is independent of contact surface area. Blocks with foam rubber and a rubber sheet are available to vary the coefficient of static friction.

Location:

  • Blocks: Dr. 4
  • Masses: Sh. A-4
  • Spring Scales: Dr. 10
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