| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 1F20.00 | Inertia of Rest | | |
| 1F20.10 | inertia balls | PIRA 200 | Break the string on the top or bottom of a suspended mass. |
| 1F20.10 | inertia balls | 1F20.10 | Two heavy iron balls are hung separately between lengths of string. Pull on one and jerk on the other. |
| 1F20.10 | inertia balls | Mc-2 | Two steel balls are suspended by strings with identical strings tied from their bottoms. Give a quick jerk to one and pull the other slowly. |
| 1F20.10 | inertial balls | M-100 | Break the string on the top or bottom of a suspended mass. |
| 1F20.10 | inertia ball | Disc 02-13 | A mass is suspended between two cords. Pull slowly or jerk on the lower cord. |
| 1F20.11 | bowling ball inertia balls | PIRA 1000 | |
| 1F20.11 | bowling ball inertia balls | 1F20.11 | Replace the standard 6 cm balls with bowling balls for increased visibility. |
| 1F20.12 | inertia balls | M-6d | One mass is hung from a string and another mass hung below it. Jerk the lower mass to break one of the strings. |
| 1F20.13 | inertia stick | 8-2.1 | A long stick is supported from rings of filter paper at each end. Break the filter paper with a pull or the stick with a jerk. |
| 1F20.15 | inertia block | PIRA 1000 | |
| 1F20.15 | inertia block | 8-1.2 | A 50 lb mass is mounted on rollers. A thread will pull it but a rope can be broken with a jerk. |
| 1F20.16 | inertia block | 1F20.16 | Tie a loop of 7/16" braided cotton cord through a hole in a 2"x4"x10" steel block. Pull and jerk with a hammer. |
| 1F20.16 | inertia block | Mc-3 | A length of rope is tied to a 10 lb. block. A pull with a hammer will move the block but a jerk will break the rope. |
| 1F20.16 | inertia block | M-101 | A rope is attached between a heavy iron ball and a hammer head. A fast swing of the hammer takes up the slack and breaks the rope without moving the ball. |
| 1F20.18 | inertia balls - analysis | AJP 46(7),710 | For the more advanced reader. The system may be treated as a forced harmonic oscillator and the classical results of the demonstration are verified analytically. Surprises emerge. |
| 1F20.20 | smash your hand | PIRA 1000 | |
| 1F20.20 | smash your hand | 1F20.20 | Place a lead block on your hand and hit it with a hammer. |
| 1F20.20 | smash your hand | Mc-1 | Hit a 10 lb. brick with a hammer while it rests on your hand. |
| 1F20.21 | smash your hand, etc. | 8-2.4 | Hit a 10 lb block on the hand or a 50 lb brick on the stomach with a hammer. Pound nails into a 50-75 lb wood block placed on a student's head. |
| 1F20.22 | hit the nail on the head | PIRA 1000 | |
| 1F20.22 | hit the nail on the head | 1F20.22 | Place a physics book, then a 6"x6" block of wood on a student's head and drive a nail into the block. |
| 1F20.22 | hit the nail on the "head" | M-6e | Drive a nail into a large block of wood placed on a student's head. |
| 1F20.25 | smash block on bed of nails | PIRA 1000 | |
| 1F20.25 | smash the block | AJP 56(9),806 | An analysis of smashing a block on a volunteer sandwiched between two nail beds. Safety issues are discussed. |
| 1F20.25 | smash the block | TPT 14(2),119 | A bed of nails is placed on the chest before smashing the block with a sledge. |
| 1F20.26 | vibrograph | M-102 | An optical lever arrangement for magnifying small displacements of a large mass when the table is hit with a hammer. |
| 1F20.30 | tablecloth pull | PIRA 500 | |
| 1F20.30 | tablecloth pull | 1F20.30 | |
| 1F20.30 | the tablecloth pull | TPT 15(4),242 | Pictures and a few hints. |
| 1F20.30 | tablecloth pull | Mc-4b | Pull the tablecloth out from under a place setting. |
| 1F20.30 | tablecloth pull | Disc 02-15 | Pull a low friction tablecloth from under a place setting. |
| 1F20.33 | inertia cylinder | PIRA 1000 | |
| 1F20.33 | inertia cylinder | 1F20.33 | Stand a 3/4" x 6" aluminum cylinder on a sheet of paper. Jerk the paper out from under the cylinder. |
| 1F20.33 | inertia cylinder | Mc-4a | Jerk a sheet of paper out from under a thin steel cylinder. |
| 1F20.34 | coin/card snap | PIRA 1000 | |
| 1F20.34 | card/coin snap | 8-2.3 | Snap a card out from under a tall object, e.g., a shipping tag from under a balanced claw hammer. |
| 1F20.34 | card/coin snap | M-104 | Several inertia tricks. |
| 1F20.34 | card/coin snap | M-6a | Snap a piece of cardboard from under a steel ball. |
| 1F20.35 | eggs and pizza pan | PIRA 500 | |
| 1F20.35 | eggs and pizza pan | 1F20.35 | Set a pizza pan on three 2l beakers full of water, stand paper cylinders with eggs at the tops above the beakers, knock out the pizza pan. |
| 1F20.35 | blocks and broomstick | 8-2.2 | Egg on a spool, on a pie tin, on a beaker of water. Flex broom and knock out pie tin. |
| 1F20.35 | eggs and pizza pan | Disc 02-16 | Place a pizza pan on three beakers, place cardboard tubes on the pan directly above the beakers, and eggs on the tubes. Knock out the pizza pan. |
| 1F20.36 | pin and embroidery hoop | PIRA 1000 | |
| 1F20.36 | pin and embroidery hoop | 1F20.36 | |
| 1F20.40 | stick on wine glasses | PIRA 1000 | |
| 1F20.40 | stick on wine glasses | 1F20.40 | Stick needles in the ends of a 3/4" sq x 4' clear pine bar. Place the needles on wine glasses full of water and break the stick with an iron bar. |
| 1F20.50 | shifted air track inertia | PIRA 1000 | |
| 1F20.50 | shifted air track inertia | 1F20.50 | Support an air track on wheels. Move the air track under an air glider. |
| 1F20.50 | shifted air track inertia | Disc 02-12 | Move the air track under an air track glider. |
| 1F20.60 | loose hammer head | Mc-5 | A hammer handle may be tightened by pounding on the far end of the handle. |
| 1F20.61 | inertia cart | M-105 | A cart has a pivoting arm with different masses but the same volume at the ends. The greater mass lags behind as the cart is accelerated. |
| 1F20.62 | string of weights | 8-1.3 | A string of weights connected by springs shows uneven deformation when jerked. |
| 1F20.64 | inertia of liquids | M-288 | There are two horizontal glass tubes, one with a cork cylinder and the other with a lead cylinder. Strike the stopper at one end of the glass tubes with a hammer and watch the direction of the cylinders. |