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Single-Quadruple WheelsSave 70%
PulleyPulley
Pulley
11589

Pulley is high-quality impact-resistant, chip-proof injection molded, balanced wheel. Smooth, clean V-groove. Wheel diameter 2", 360 degrees swivel hooks-top and bottom. All steel blocks.

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From $0.59 $1.95 Each
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Single-Quadruple WheelsSave 70%
Tandem PulleyTandem Pulley
Tandem Pulley
13654

Pulley is high-quality impact-resistant, chip-proof injection molded, balanced wheel. Smooth, clean V-groove. Wheel diameter 2", 360 degrees swivel hooks-top and bottom. All steel blocks.

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From $1.28 $4.25 Each
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Density Cylinders - Set of 4
Density Cylinders - Set of 4
14705

Aluminum, brass, copper, and steel. 50mm x 12.5 mm.
Aluminum, brass, copper, and steel. 50mm x 12.5 mm.

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$3.45 Set $11.50 Set
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Inclined Plane w/ Protractor
Inclined Plane w/ Protractor
14700

Polished wooden top 600x100x 20mm. With pulley. Hinged to a polished wooden base 400 x 100 x 20mm. The plane can be fixed at any angle with the help of a clamp. Supplied complete with aluminum graduated protractor, cylindrical plated metal roller 38mm in diameter and scale pan but without weights.
Polished wooden top 600x100x 20mm. With pulley. Hinged to a polished wooden base 400 x 100 x 20mm. The plane can be fixed at any angle with the help of a clamp. Supplied complete with aluminum graduated protractor, cylindrical plated metal roller 38mm in diameter and scale pan but without weights.

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$21.15 Each $70.50 Each
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Scale Pan
Scale Pan
14701

General purpose use and also for use with inclined plane. Metal pan with cords for suspension.

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$1.43 Each $4.75 Each
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Inertia Demonstrator
Inertia Demonstrator
16963

This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.
This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.

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$5.69 Each $18.95 Each
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Gyroscope
Gyroscope
11735

6 cm in diameter. Supplied with supported base with socket at top end for holding the gyroscope and demonstrating various principles.
6 cm in diameter. Supplied with supported base with socket at top end for holding the gyroscope and demonstrating various principles.

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$5.01 Each $16.70 Each
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Pulley with Clamp
Pulley with Clamp
14778

Rugged plastic pulley with deep V groves mounted on a metal clamp. The sheave is 50mm in diameter. Clamp can be mounted on surfaces up to 25mm thick.
Rugged plastic pulley with deep V groves mounted on a metal clamp. The sheave is 50mm in diameter. Clamp can be mounted on surfaces up to 25mm thick.

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$1.79 Each $5.95 Each
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Linear Expansion Apparatus
Linear Expansion Apparatus
14696

Metal construction. Complete with 3 metal rods (aluminum, bass and iron). stove hammer finish mounted on wooden polished base.
Metal construction. Complete with 3 metal rods (aluminum, bass and iron). stove hammer finish mounted on wooden polished base.

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$15.59 Each $51.95 Each
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Thames and Kosmos Physics Workshop KitThames and Kosmos Physics Workshop Kit
Thames and Kosmos Physics Workshop Kit
16263

Kit includes more than 300 building pieces
Build a windmill, two-speed crane, force scale, sail car, mars robot, and more
Experiment with gears, levers, screws, inclined planes, pulleys, wheels and axles
Learn and understand the most fundamental physics equations
It is a 64-page, full-color experiment manual
Centrifuge, pinball, centrifugal switch, ship's lantern, and dozens of other models
 Ages 8 and up

Force = mass x acceleration and don't forget to factor in the fun. This kit studies the Science of Matter and Energy. Through building 36 models and conducting subsequent experiments with the models, you will learn the fundamental laws of mechanical physics. This hands-on approach is both fun and effective because the principles of physics are demonstrated right in front of you. Physics Workshop includes more than 300 building pieces. The full-color 64-page manual presents assembly instructions, experiments and explanations in a richly-illustrated, easy-to-follow manner. 73 Experiments and Activities: Build a windmill, crane, sail car, mars robot, hammer machine, centrifuge, scale and dozens of other models. Experiment with simple machines: gears, levers, screws, inclined planes, pulleys, wheels and axles. Learn and understand the most fundamental physics equations. Read about amazing real-world applications for physics.

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$17.99 Each $59.95 Each
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Elasticity of Gases Kit
Elasticity of Gases Kit
15228

Serves to demonstrate Boyle's Law. Shows what happens when gases are subjected to increased pressure. The plastic syringe, with solid wood base and platen, is constructed so that the calibrations denoting interior volume read right side up. As masses of bricks, books, or other heavy objects are increased, the gas in the syringe is compressed to smaller and smaller volume. The kit includes: 1 Syringe Cylinder w/ Cap, 1 Syringe Piston, 1 Base, 1 Platen.
Serves to demonstrate Boyle's Law. Shows what happens when gases are subjected to increased pressure. The plastic syringe, with solid wood base and platen, is constructed so that the calibrations denoting interior volume read right side up. As masses of bricks, books, or other heavy objects are increased, the gas in the syringe is compressed to smaller and smaller volume. The kit includes: 1 Syringe Cylinder w/ Cap, 1 Syringe Piston, 1 Base, 1 Platen.

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$3.89 Each $12.95 Each
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Archimedes Principle Demonstration
Archimedes Principle Demonstration
14703

Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.
Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.

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$4.05 Each $13.50 Each
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Ball and Card
Ball and Card
11736

Newton's Second Law of Motion. Demonstrates inertia.
Newton's Second Law of Motion. Demonstrates inertia.

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$3.29 Each $10.95 Each
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Cosmic Energy Kinetic Scuplture
Cosmic Energy Kinetic Scuplture
12932

Battery charged electro-magnetic mobile with perpetually moving forms. 9 1/4" high. One 9V battery required.
Battery charged electro-magnetic mobile with perpetually moving forms. 9 1/4" high. One 9V battery required.

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$3.89 Each $12.95 Each
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Hoberman SphereHoberman Sphere
Hoberman Sphere
14327

Combines mathematics, geometry and aesthetics into a magical motion of surprising simplicity, beauty and fun. Its system of polymer links expand and contract almost effortlessly, changing in volume 30 times. A sturdy toy, an object of art, a tool for teaching mathematics and science - the Hoberman Sphere's universal appeal and versatility have led its owners to discover uses even its inventor never dreamed of. Children love to wear it on their heads, or climb inside. Grown-ups have proved themselves no less inventive: jugglers juggle with them. Drill teams march with them. Magicians make magic with them. Teachers teach geometry with them. Motivational speakers use them as metaphors for unity, teamwork and expanding potential. Ages 4 and up. Expands from 9.5" to 30".

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$10.49 Each $34.95 Each
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The Spillnot
The Spillnot
16962

The design of the Spillnot uses the principles of Newtonian physics to keep the liquid in the container. The flexible handle and location of the suspension point above the center of the tray ensure that the forces on the liquid are always directed toward the supporting tray, even when the tray is in motion. Sideways forces usually responsible for spills are not transmitted to the tray by the flexible handle. Radial forces generated during swinging motion only force the liquid into the container more firmly. An inexpensive demonstration to intrigue students and challenge their analytical powers! Includes activity guide. 5" x 5" x 9". Weight: .25 lbs.
The design of the Spillnot uses the principles of Newtonian physics to keep the liquid in the container. The flexible handle and location of the suspension point above the center of the tray ensure that the forces on the liquid are always directed toward the supporting tray, even when the tray is in motion. Sideways forces usually responsible for spills are not transmitted to the tray by the flexible handle. Radial forces generated during swinging motion only force the liquid into the container more firmly. An inexpensive demonstration to intrigue students and challenge their analytical powers! Includes activity guide. 5" x 5" x 9". Weight: .25 lbs.

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$5.85 Each $19.50 Each
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Pulley on Rod
Pulley on Rod
14776

Aluminum pulley 50mm diameter. Mounted in a bracket on a rod.
Aluminum pulley 50mm diameter. Mounted in a bracket on a rod.

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$2.55 Each $8.50 Each
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Pulley Bench Mounting
Pulley Bench Mounting
14777

Aluminum pulley 37mm diameter. mounted in thick strong metal frame for clamping to benches or boards.
Aluminum pulley 37mm diameter. mounted in thick strong metal frame for clamping to benches or boards.

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$2.25 Each $7.50 Each
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Bench Mounting Adjustable Pulley
Bench Mounting Adjustable Pulley
16870

Strong all metal construction, can be mounted on a table up to 2" (50mm) thick. Aluminum Pulley, 1.125" (300m) diameter, mounted on a vertically height adjustable bracket, which can slide up and down, and can be tightened at any point, from being parallel to the clamping surface, up to 2" (50mm) higher to the clamping surface.
Strong all metal construction, can be mounted on a table up to 2" (50mm) thick. Aluminum Pulley, 1.125" (300m) diameter, mounted on a vertically height adjustable bracket, which can slide up and down, and can be tightened at any point, from being parallel to the clamping surface, up to 2" (50mm) higher to the clamping surface.

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$3.15 Each $10.50 Each
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Gas Convection Apparatus
Gas Convection Apparatus
14698

Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.
Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.

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$7.35 Each $24.50 Each
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Bar and Gauge
Bar and Gauge
14699

Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.
Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.

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$3.29 Each $10.95 Each
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Heat Transfer Kit
Heat Transfer Kit
15230

Students fill one container with water at room temperature and the other with boiling water. A thermometer is placed in each container and the water temperature in both cups read before heat transfer. The metal bar is then immersed in the cups, and students observe heat lost by boiling water and heat gained in the cooler water. Each kit includes: 2 insulated containers; 2 insulated lids with slots; 1 U-shaped aluminum transfer bar; 2 thermometers 20 degrees to 110 degrees. Additional materials required: low-temperature thermometer.

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$10.19 Each $33.95 Each
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Concepts of Heat and Temperature Kit (Student version)
Concepts of Heat and Temperature Kit (Student version)
15627

Same as 15626, but does not include Basic Linear Expansion apparatus.
Same as 15626, but does not include Basic Linear Expansion apparatus.

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$21.15 Each $70.50 Each
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Heat Absorption Apparatus
Heat Absorption Apparatus
16895

To study and demonstrate heat absorption and radiation. Consists of two metal concave plates one white and the other painted black with thermometer holders on the back, and in-between is a lamp, heat source. When the lamp is switched on and the temperature is measured of the metal plates, it can be studied which one absorbs heat quicker and more than the other. After the lamp is turned off, we can also study which losses heat quicker. Lamp operates on 12VDC. Base Size 7.75" x 7.75" x 0.5". Metal plates are 3.75" in dia. Total height of unit 5.5". One bulb included, thermometers not included.
To study and demonstrate heat absorption and radiation. Consists of two metal concave plates one white and the other painted black with thermometer holders on the back, and in-between is a lamp, heat source. When the lamp is switched on and the temperature is measured of the metal plates, it can be studied which one absorbs heat quicker and more than the other. After the lamp is turned off, we can also study which losses heat quicker. Lamp operates on 12VDC. Base Size 7.75" x 7.75" x 0.5". Metal plates are 3.75" in dia. Total height of unit 5.5". One bulb included, thermometers not included.

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$10.65 Each $35.50 Each