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Mechanics > Motion in two dimensions > Central Forces
Code
Demo Name
Description
1D50.10
Pumpkin on a String
This demo is a basic cushion attached to a string that can be used to demonstrate circular motion and force.
1D50.20
Whirligig
Forces of Circular Motion Whirligig Demo
Whirligig
Circular motion is demonstrated using a device called a whirligig. When force is applied to a lighter ball by being spun in a circular motion over head and a heavier ball that is attached by a string is lifted.
1D50.40
Bucket of Water
Forces of Circular Motion with Bucket of Water
Bucket of Water
Rotate a bucket of water in a vertical circle and show how central forces keep you from getting wet.
1D50.40
Greek Waiter's Tray
Forces of Circular Motion with Greek Waiter Tray Demo
Greek Waiter's Tray
A plastic glass of water on a platform supported by a three or four point suspension is rotated horizontally or vertically without spilling.
1D50.70
Spinning Chain
A loop of chain is spun up on a disc and then released. The chain retains its circular shape as it rolls across the lecture bench or over objects in its path.
Disclaimer:
These demonstrations are provided only for illustrative use by persons affiliated with Rutgers University and only under the direction of a trained instructor or physicist. Rutgers University is not responsible for any demonstrations performed by those using their own or others equipment, or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here, entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition, and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.