File:DroppedPhone.png
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DroppedPhone.png (395 × 297 pixels, file size: 19 KB, MIME type: image/png)
Captions
Captions
Shows how gravity, as a geometric force, is invisible to mobile phone accelerometers.
Summary
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| Description |
English: Science Journal accelerometer data on a phone dropped and caught 3 times.
During the free-fall segments, the accelerometer reading drops to zero because gravity is a geometric force (like centrifugal) which acts on every ounce of the phone's structure, and is hence not detected. This is because accelerometer's only detect (frame-invariant) proper-forces[1], like the upward force of your hand when holding the phone in place before the drop. The positive spikes occur when the fall is arrested as the falling phone is caught (also by hand) before it hit the floor. |
| Date | |
| Source | Own work |
| Author | P. Fraundorf |
Licensing
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I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
- ↑ P. Fraundorf (2016) "The proper-force 3-vector", HAL-01344268 current pdf.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:11, 19 March 2022 | | 395 × 297 (19 KB) | Unitsphere (talk | contribs) | added markup |
| 12:07, 7 October 2016 |  | 491 × 300 (9 KB) | Unitsphere (talk | contribs) | User created page with UploadWizard |
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