| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 1K10.00 | Dynamic Torque | | |
| 1K10.10 | tipping block | PIRA 500 | |
| 1K10.10 | tipping block | 1K10.10 | Pull with a spring scale at various angles on the edge of a block. |
| 1K10.10 | tipping block | Mo-4 | A large wooden block is tipped over with a spring scale. |
| 1K10.10 | tipping block | 14-3.2 | A spring scale is used to show the least force required to overturn a cube. |
| 1K10.11 | tipping blocks | PIRA 1000 | |
| 1K10.11 | tipping blocks | 1K10.11 | Same as TPT 22(8),538. |
| 1K10.11 | tipping block | TPT 22(8),538 | Show the force necessary to tip over trapezoidal and weighted rectangular blocks. The students are surprised to discover the force needed is not related to the position of the center of mass. |
| 1K10.20 | ladder against a wall | PIRA 200 | Set a model ladder against a box and move a weight up a rung at a time. |
| 1K10.20 | ladder against a wall | 1K10.20 | A model ladder is set against a box and a weight moved up a rung at a time. |
| 1K10.20 | forces on a ladder | Mo-8 | A small model ladder is placed against a box. |
| 1K10.20 | ladder forces | Disc 04-18 | A real ladder leans against the wall. Animation shows the forces as the ladder moves. |
| 1K10.25 | forces on a ladder - full scale | PIRA 1000 | |
| 1K10.25 | forces on a ladder - full scale | 1K10.25 | Mount a set of wheels at the top of a ladder, place some shoes at the bottom to decrease friction and climb the ladder until you fall down. |
| 1K10.25 | forces on a ladder - full scale | M-30 | Wheels are attached to the top of a ladder and the bottom slides on the floor. Climb up the ladder and fall down. |
| 1K10.30 | walking the spool | PIRA 200 | Pull at various angles on the cord wrapped around the hub of a spool to move the spool forward or back. |
| 1K10.30 | walking the spool | 1K10.30 | Pull on the cord wrapped around the hub of a spool at various angles to make the spool move forward or back. |
| 1K10.30 | walking the spool | Mo-3 | Pull on a cord wrapped around the axle of a large spool. The spool can be made to go forward or backward depending on the angle. |
| 1K10.30 | walking the spool | M-24 | A string is pulled off the inner axis of a spool at different angles, changing the direction the spool rolls. |
| 1K10.30 | walking the spool | M-10d | A string wound around the center of a spool is pulled at different angles causing the spool to change directions. Diagram and analysis. See TPT 2(3),139. |
| 1K10.30 | spool with wrapped ribbon | Disc 06-07 | The sides of the spool are made of clear plexiglass |
| 1K10.31 | walking the spool x three | 12-5.3 | Three rolling spools where the outer discs ride on rails and the center section with the string is larger, smaller, and the same size as the outer discs allowing one to always pull horizontally. |
| 1K10.40 | pull the bike pedal | PIRA 1000 | |
| 1K10.40 | pull the bike pedal | 1K10.40 | Lock the front wheel, remove the brake, add training wheels, and pull backwards on the pedal in the down position. |
| 1K10.40 | pull the bike pedal | 12-4.3 | Pulling backward on a pedal (in the down position) of a brakeless bike will cause the bike to go back unless the length of the pedal crank is increased. |
| 1K10.40 | pull the bike pedal | M-25 | Pull backward on a pedal at its lowest point and the bike will move backward. |
| 1K10.41 | traction force roller | PIRA 1000 | |
| 1K10.41 | traction force roller | 1K10.41 | Pull on a string wrapped around the circumference of a cylinder on a roller cart. Pull on a yoke attached to the axle of the same cylinder on the roller cart. |
| 1K10.41 | traction force roller | AJP 34(3),xxix | A large pulley on a roller cart is drawn either by a string wrapped around the circumference or by a yoke attached to the axle. |
| 1K10.41 | traction force roller | Ms-6 | A large pulley can be drawn by either pulling on the axle or on a string wrapped around the perimeter. Try each case while the pulley is resting on a roller cart. |
| 1K10.42 | extended traction force | PIRA 1000 | |
| 1K10.42 | extended traction force | 1K10.42 | Pull on a string wrapped around the circumference of a cylinder placed on an air track glider. |
| 1K10.42 | extended traction force | TPT 28(9),600 | A string wound around a cylinder, hoop, and spool is pulled while the objects are on a roller cart and the reaction force direction is surprising. |
| 1K10.50 | rolling uphill | PIRA 1000 | |
| 1K10.50 | rolling uphill | 1K10.50 | A disc with a nonuniform mass distribution is placed on an incline so it rolls uphill. |
| 1K10.50 | rolling uphill | Mp-3 | A loaded disc is put on an inclined plane so it rolls uphill or rolls to the edge of the lecture bench and back. |
| 1K10.50 | rolling uphill | M-35 | A large wood disc weighted on one side will roll uphill or to the edge of a table and back. |
| 1K10.50 | loaded disc | Disc 03-25 | A loaded disc can roll up an incline. |
| 1K10.80 | teaching couples | AJP 28(9),819 | Start with two index fingers rotating a meter stick about the center of mass, use it to go into couples. Read it. |
| 1K10.81 | free vector | M-20 | A strong magnet on a counterbalanced cork always rotates about the center of mass no matter where the magnet is placed. |
| 1K10.82 | couples | 10-2.8 | An arrangement to apply equal forces to opposite sides of a pulley mounted on a dry ice supported steel bar. |
| 1K10.83 | air jet couple | AJP 28(1),76 | Air from a balloon is released through two nozzles offset from the center of mass. The assembly is free to rotate on a block of dry ice. |
| 1K10.90 | saw-horse on teter-totter | TPT 5(3),138 | Good luck trying to demonstrate this one. |