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 ⇤ ← Revision 22 as of 2012-06-20 19:32:49 → Size: 9060 Editor: srnarf Comment: ← Revision 23 as of 2012-06-20 21:04:09 → ⇥ Size: 9060 Editor: srnarf Comment: Deletions are marked like this. Additions are marked like this. Line 45: Line 45: ||1K20.32||[:Friction on an Adjustable Inclined Plane]|| || Line 47: Line 46: ||1K20.36||[:Friction on an Adjustable Inclined Plane]|| ||
 [:PiraScheme#Mechanics: Table of Mechanics] [:RigidBodies: Mechanics (1J): Statistics of Rigid Bodies] [:Gravity: Mechanics (1L): Gravity] [:Demonstrations:Lecture Demonstrations]

## Applications of Newton's Laws

PIRA classification 1K

34 Demonstrations listed of which 20 are grayed out

 Grayed out demonstrations are not available or within our archive and are under consideration to be added.

# 1K20. Friction

 PIRA # Demonstration Name Abstract 1K20.05 Washboard Friction Model Two plants with a zig-zag pattern cut in the faces. Slide them past each other. 1K20.10 Friction Blocks Pull blocks with different surfaces across the lecture bench with a spring scale. 1K20.13 Sliding Friction Machine A spring scale is attached to an object on a rotating table. See [http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000033000002000161000001&idtype=cvips&doi=10.1119/1.1971287&prog=normal AJP 33(2),161]. 1K20.15 Weight Dependence of Friction Pull a friction block with a spring scale, place a second block of equal weight on top of the first and repeat. 1K20.16 Sliding Block A loaded cart rolls down an incline and hits a barrier. The load continues sliding on a second incline until it stops. The mass on the slider is varied to show stopping distance independent of mass. 1K20.20 Area Dependence of Friction A friction block is slid across the table with a spring scale measuring the friction force. One side has a an area ten times larger than the other, shaped like a plank with two small blocks attached to one face. See [http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1 Sutton M-49]. 1K20.20 Area Dependence of Friction A 2X12 is pulled along the bench top while resting on either the narrow or wide face. 1K20.30 Static vs. Sliding Friction Use a spring scale and block to show that static friction is greater than sliding friction. 1K20.35 Angle of Repose An inclined plane is raised until a block starts to slide. 1K20.36 [:Friction on an Adjustable Inclined Plane] 1K20.37 Tire Friction The automobile tire is a misleading example of static and sliding friction. See [http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000046000008000858000001&idtype=cvips&doi=10.1119/1.11406&prog=normal AJP 46(8),858]. 1K20.40 Stability and Breaking of Cars A toy car slides down an incline with either front or rear wheels locked. 1K20.42 Friction Roller A cylindrical roller is pulled or slid across the lecture bench with a spring scale. 1K20.60 Sliding Chain Hang a chain over the edge of the table until the weight of the chain makes it slide. 1K20.70 Falling Flask Capstan Attach a 4 liter r.b. flask at one end of a sting, attach a ball to the other end and drape the flask over a horizontal rod 4' high. Let go of the ball. 1K20.74 Friction Pendulum A ball is suspended by a loop of string over a slowly turning horizontal wooden bar. A large amplitude results. See [http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1 Sutton M-54]. 1K20.76 Tree Climbing A string is looped down through a tube, which is attached to a board, and around a nail which is not, and back up through another tube, which is attached to the same board. Pulling the ends of the string up and down results in the entire apparatus climbing up the string. 1K20.90 Air Track Friction Show there is little friction on an air track.

# 1K30. Pressure

 PIRA # Demonstration Name Abstract 1K30.10 [:BedofNails:Bed of Nails] A 2′ by 4.5′ bed of nails is made up of 80d nails placed in a 1" grid. The bed contains 1375 aluminum nails which have been leveled and dulled. A second bed of nails (1.5′ x 2.5′) made up of 425 aluminum nails placed in a 1" grid can be placed on top of the person lying on the larger bed of nails. For extra excitement, break a cinder block that is placed, centered and stable, on top of the small bed of nails. 1K30.20 Pop the Balloon A balloon can be pressed into varying densities of nails by varying amounts of weight.

[:Demonstrations:Demonstrations]

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fw: AppNewtonsLaws (last edited 2018-07-18 16:53:21 by srnarf)