| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 1Q40.00 | Conservation of Angular Momentun | | |
| 1Q40.10 | rotating stool and weights | PIRA 200 | Spin on a rotating stool with a dumbell in each hand. |
| 1Q40.10 | rotating stool and dumbells | 1Q40.10 | A person on a rotating stool moves dumbbells out and in. |
| 1Q40.10 | rotating stool and dumbells | Mt-2 | Instructor stands on a rotating platform with a heavy dumbbell in each hand. |
| 1Q40.10 | rotating stool and dumbells | M-176 | Extend and retract your arms while rotating on a stool. |
| 1Q40.10 | rotating stool and dumbells | M-19i | Spin on a rotating stool with a dumbbell in each hand. |
| 1Q40.10 | rotating stool with weights | Disc 07-04 | A person sits on a rotating stool and moves weights in and out. |
| 1Q40.11 | big rotating stool and dumbells | AJP 45(7),636 | A cable pulley system moves large masses from 60 to 180 cm. |
| 1Q40.12 | rotating platform and dumbells | AJP 30(7),528 | Make a rotating platform out of two disks of 3/4" plywood and a large diameter thrust bearing. |
| 1Q40.13 | rotating stool | 13-7.9 | Rotating platform made out of an auto front wheel bearing. |
| 1Q40.15 | rotating stool and long bar | PIRA 500 | |
| 1Q40.15 | rotating stool and long bar | 1Q40.15 | Sit on a rotating stool holding a long bar with masses at the ends. Rotate the bar one way and you turn the other way. |
| 1Q40.15 | rotating stool and long bar | Disc 07-05 | Sit on the stool and hold a long bar with weights on the ends. Rotate the bar and you will move in the opposite sense. |
| 1Q40.16 | rotating stool and bat | Mt-3 | Stand on a rotating platform and swing a bat. |
| 1Q40.16 | rotating stool and bat | M-172 | Stand on a rotating stool and swing a baseball bat. |
| 1Q40.20 | squeezatron | PIRA 500 | |
| 1Q40.20 | squeezatron | 1Q40.20 | A flyball governor can be expanded or contracted by squeezing a handle. |
| 1Q40.20 | rotating adjustable balls | AJP 33(4),345 | Plans for a two ball adjustable governor type conservation apparatus. |
| 1Q40.20 | squeezatron | Mt-1 | A flyball governor can be expanded or contracted by a squeeze handle. |
| 1Q40.20 | squeezatron | 13-7.13 | Pulling a string decreases the radius of two masses rotating at the ends of a rod. |
| 1Q40.20 | squeezatron | M-177 | A mechanical device for showing the pirouette effect. |
| 1Q40.21 | dry ice puck rotators | 10-2.9 | Two dry ice puck rotators: a) steel balls separate, b) they come together. |
| 1Q40.23 | centrifugal governor | PIRA 1000 | |
| 1Q40.23 | governors | Mm-4c | A small governor is spun on a hand crank rotator. |
| 1Q40.23 | Watt's regulator | M-158 | Use a model of Watt's regulator. |
| 1Q40.23 | govenors | M-16f | The Cenco Watt's governor shown with a valve regulating gear. |
| 1Q40.23 | centrifugal governor | Disc 05-26 | A model of a governor. |
| 1Q40.25 | pulling on the whirligig | PIRA 1000 | |
| 1Q40.25 | pulling on the whirligig | 1Q40.25 | Pull on the bottom ball of the whirligig. |
| 1Q40.25 | pulling on the whirlagig | Ms-5 | Balls are attached to either ends of a string that passes through a hollow tube. Set one ball twirling and pull on the other ball to change the radius. |
| 1Q40.25 | pulling on the whirlagig | 13-7.6 | Shorten the string of a rotating ball on a string. |
| 1Q40.26 | pulling on the whirlagig | M-186 | A ball on a string rolls on the lecture table. In one case the cord wraps itself around a vertical rod. In the other, to cord is pulled through a hole in the table. |
| 1Q40.30 | rotating stool and bicycle wheel | PIRA 200 | Invert a spinning bike wheel while sitting on a rotating stool. |
| 1Q40.30 | rotating stool and bicycle wheel | 1Q40.30 | A person sits on a rotating stool, spins a bicycle wheel and turns it over and back. |
| 1Q40.30 | rotating stool and bicycle wheel | Mu-1 | Inverting a spinning bicycle wheel while on a rotating stool, passing it back and forth. |
| 1Q40.30 | rotating stool and bicycle wheel | M-178 | Spin and turn a bike wheel while on a rotating stool. |
| 1Q40.30 | rotating stool and bicycle wheel | Disc 07-06 | Invert a spinning bike wheel while sitting on a rotating stool. |
| 1Q40.31 | stool, bicycle wheel, and friction | AJP 35(3),286 | Slow down the bike wheel deliberately to emphasize the role of friction in transfer of momentum. |
| 1Q40.32 | rotating stool and bicycle wheel | M-19f | Wrap the bicycle wheel with no. 9 iron wire. |
| 1Q40.33 | drop the cat | M-175 | Turn yourself around on a rotating stool by variation of moment of inertia. Also, make a model of a cat. |
| 1Q40.34 | skiing | TPT 11(7),415 | Go skiing while holding a bike wheel gyro. By conservation of angular momentum, turn yourself with the gyro. |
| 1Q40.34 | skiing | 13-7.7 | Stand on a rotating turntable with skies on to show the upper part of the body turning opposite the lower. |
| 1Q40.40 | train on a circular track | PIRA 1000 | |
| 1Q40.40 | train on a circular track | 1Q40.40 | A HO gage train runs on a track mounted on a bike rim. |
| 1Q40.40 | angular momentum train | Mt-4 | A circular track on a rotating platform and a train have the same mass. The train and track move in opposite directions. |
| 1Q40.40 | angular momentum train | M-8b | A train on a rotating platform. |
| 1Q40.40 | train on a circular track | Disc 07-02 | A wind up train rides on a track mounted on the rim of a horizontal bicycle wheel. |
| 1Q40.41 | angular momentum train - air table | AJP 41(1),137 | The circular track is mounted on a large air table puck. |
| 1Q40.42 | frictional transfer of ang. momemtum | M-185 | Diagram. A balanced framework constrains a spinning wheel. As the wheel slows down, the framework begins to rotate. |
| 1Q40.43 | coupled windmills | M-174 | Picture. Two angular momentum machines (M-166) are coupled by a spring. The spring is wound and both are released simultaneously to show opposite reactions. |
| 1Q40.44 | counter spinning | AJP 44(1),21 | An induction motor is mounted so both the frame and armature can rotate freely. No torque is required to tilt the direction of axis of rotation unless either the frame or armature is constrained. |
| 1Q40.45 | wheel and brake | PIRA 1000 | |
| 1Q40.45 | noncoaxial rotating disks | AJP 57(10),951 | A battery driven turntable rotates noncoaxially on a frictionless turntable. |
| 1Q40.45 | wheel and brake | Disc 07-08 | A horizontal rotating bicycle wheel is braked to a large frame and the combined assembly rotates slower. |
| 1Q40.50 | pocket watch | PIRA 1000 | |
| 1Q40.50 | pocket watch | 13-7.8 | A small pendulum is suspended from the stem on pocket watch placed on a small watch glass on a stand. |
| 1Q40.50 | pocket watch | M-173 | Suspend a pocket watch by its ring from a sharp edge. |
| 1Q40.50 | tail wags dog | Disc 07-03 | Use a laser to magnify the motion of a pocket watch. |
| 1Q40.52 | various demos | 13-7.4 | You read this one. |
| 1Q40.53 | various demos | 13-7.5 | A free system of two discs, one attached to a motor shaft and the other to the motor, is powered through slip rings. Show the discs rotate in opposite directions and come to rest at the same time. |
| 1Q40.54 | orbital angular momentum | AJP 31(1),42 | Apparatus Drawings Project No.33: A dumbbell pivoting on its center of mass, on a counterwieghted rod rotated about its center of mass, remains oriented in the original direction until friction prevails. |
| 1Q40.55 | buzz button | Mt-5 | Pull on a twisted loop of string threaded through a large button to get the thing to oscillate. |
| 1Q40.55 | buzz button | M-171 | A 6" wooden disc supported by a loop of string passing through two holes drilled 1/2" apart. Directions for showing constancy of axes. |
| 1Q40.57 | colliding air pucks | 10-3.3 | The linear and angular momentum are recorded with strobed photography. The pucks have an arrow to indicate rotation. |
| 1Q40.59 | colliding spinning orbiting pucks | 10-2.11 | One massive dry ice puck contains a motorized windlass that winds up a connecting string, the other has the string wound around it. One orbits, the other spins and when the come together they stop dead. |
| 1Q40.60 | sewer pipe pull | PIRA 1000 | |
| 1Q40.60 | sewer pipe pull | 1Q40.60 | Put "o" rings around a section of large PVC pipe to act as tires. Place on a sheet of paper and pull the paper out from under it. |
| 1Q40.60 | sewer pipe pull | AJP 54(8),741 | A newspaper is pulled out from under a large sewer pipe with O ring tires. When the paper is all the way out, the pipe stops dead. |
| 1Q40.60 | various demos | 13-7.10 | Pull a strip of paper horizontally from under a rubber ball. As soon as the ball is off the strip, it stops dead. |
| 1Q40.63 | off-center flywheel | AJP 28(1),76 | A flat plate is free to rotate on a block of dry ice. The plate rotates about its center of mass when the flywheel at one end slows down. |
| 1Q40.65 | double flywheel rotator | AJP 53(8),735 | Two flywheels free to rotate about a vertical axis on a bar which is also free to rotate about a vertical axis are coupled in various ways to demonstrate "spin-spin" and "spin-orbit" coupling with and without dissipation. |
| 1Q40.70 | marbles and funnel | PIRA 1000 | |
| 1Q40.70 | marbles and funnel | Disc 07-01 | The angular speed of marbles increases as they approach the bottom of a large funnel. |
| 1Q40.80 | Hero's engine | PIRA 1000 | |
| 1Q40.80 | Hero's engine | 1Q40.80 | Similar to disc 15-07. |
| 1Q40.80 | Hero's engine | AJP 46(7),773 | Plans for a machine shop built Hero's engine. |
| 1Q40.80 | Hero's engine | Hn-5 | A model of Hero's engine. |
| 1Q40.80 | Hero's engine | 13-7.11 | A simple Hero's engine made of a tin can. |
| 1Q40.80 | Hero's engine | M-183 | Cylindrical boiler pivots on a vertical axis with tangential pressure relief nozzles. |
| 1Q40.80 | Hero's engine | H-5a.1 | A suspended round bottom flask with two nozzles. |
| 1Q40.80 | Hero's engine | Disc 15-07 | The flask rotates on a horizontal axis. |
| 1Q40.81 | Hero's engine - sprinkler | Mt-6 | A lawn sprinkler. |
| 1Q40.81 | Hero's engine - sprinkler | M-184 | A gravity head of water is used to drive a Hero's engine device (lawn sprinkler). |
| 1Q40.82 | air rotator with deflectors | PIRA 1000 | |
| 1Q40.82 | air rotator with deflectors | Disc 06-03 | Run an air sprinkler, then mount deflectors to reverse the jet. |
| 1Q40.85 | the Feynman inverse sprinkler | AJP 57(7),654 | A demonstration showing the inverse sprinkler moves in a direction opposite to that of a normal sprinkler. |
| 1Q40.85 | inverse sprinkler - kinematic study | AJP 59(4),349 | An extension of the AJP 57(7) article. |
| 1Q40.85 | the sprinkler problem | AJP 58(4),352 | A design for the sprinkler/inverse sprinkler and a lot of analysis. |
| 1Q40.86 | Hero's engine | 13-7.12 | Place an air jet Hero's engine in a bell jar and pump out some air. |
| 1Q40.87 | inverse sprinkler demonstration | AJP 56(4),307 | An inverse sprinkler made of soda straw in a carboy exhibits no motion. |
| 1Q40.88 | inverse sprinkler - no rotation | AJP 54(9),798 | A conservation of angular momentum argument is invoked to show that no rotation will result in an inverse sprinkler. |
| 1Q40.88 | inverse sprinkler | AJP 55(6),488 | A letter full of opinions. |
| 1Q40.88 | inverse sprinkler letter reply | AJP 55(6),488 | The writer of the previous letter has comments "drawn from thin air", not unlike most of these little blurbs. |