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Middle School



- Demonstration Kits
Tap the Celt on either end and watch it spin. Spin the Celt clockwise and it will stop and spin in the other direction. What causes the Celt to spin this way? Complete instructions and explanations are included.
Centrifugal Circle
Help students understand centripetal force while they dispel popular misconceptions about centrifugal force. A vivid demonstration of Newton's first law of motion-the law of inertia. Students watch a ball roll along a circular course. They then predi...
Bracken's Demonstration Spinner
Introduce your students to the fast, fun and entertaining world of centrifuge demonstrations! Perform a wide array of physical science and chemistry demonstrations such as the Standing Wave Generator, Newton's Color Wheels, Butterfly Orbital, and Cen...
Centrifugal Hoop Demonstration
Easily demonstrate the phenomenon of centrifugal force! Students will be amazed as this ingenious circular hoop flattens as it spins. The hoop is designed of a plastic material, which greatly increases the safety over the standard metal centrifuge de...
Circular Motion Paradox
This discrepant event demonstration will really get your students thinking about circular motion concepts! Just spin the device by hand and watch the tethered bobbers move almost “magically” into the center of the circle and not to the outside as you...
Curve Ahead, Reduce Speed! Centripetal Force Demonstration Kit
Rounding a curve too fast on a bike or in a car can be dangerous! Determine the maximum speed an object can safely travel along a curved path under various conditions by analyzing the effects of the radius of a curve, banking the curve, and friction ...
Figure Skating Dumbbells
Quickly demonstrate angular momentum—with a twist! Stand on a rotating platform holding the dumbbells straight out. After a slow rotation is applied, pull in the dumbbells as close to your body as possible. Your students will be astonished with how f...
Greek Waiter's Tray
Demonstrate the properties of centripetal force. Confidently swing a filled “wine” glass in dizzying overhead circles as you discuss forces, rotational motion, and gravity. A simple pendulum is included that can be used to deduce the forces acting on...
The Gyroscope has been a classic educational toy for generations. It will fascinate your students with its mysterious force that seems to defy gravity. The included Chem Fax discusses the mystery behind the Gyroscope.
Bicycle Wheel Gyroscope
Amaze your students with an object that appears to defy gravity! Twist the handles of the spinning handheld bicycle wheel and feel the peculiar body sensation associated with gyroscopic motion. The resulting resistance illustrates the use of gyroscop...
Ring and Disc
It's a race! A ring and disc of equal mass and diameter speed down an inclined plane. Which one wins? Not an easy prediction to make but the victor will be clear. Results are explained using concepts of inertia, rotational inertia and potential and k...
The Flying Pig
If a flying pig is tethered to the ceiling with a string and propelled in a circle by flapping wings—what is the angle the string makes? What would the force diagram look like? How can the flying pig be explained by Newton’s laws? Add some laughs and...

Teacher Resources

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