# Why don't perpetual motion machines ever work?

- Institution: TED
- Department: TED-Ed
- Speaker: Netta Schramm
- Year: 2017
- Level: For everyone
- Language: English
- Subjects: Engineering, Earth and environment, History, Art, architecture and design
- Source: [TED](https://www.ted.com/talks/netta_schramm_why_don_t_perpetual_motion_machines_ever_work)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors' imaginations because they could totally transform our relationship with energy. There's just one problem: they don't work. Why not? Netta Schramm describes the pitfalls of perpetual motion machines. \[Directed by TED-Ed, narrated by Addison Anderson\].

## Lectures

1. [Why don't perpetual motion machines ever work?](https://invisiblenetwork.ai/learn/ted/netta_schramm_why_don_t_perpetual_motion_machines_ever_work/92a512d8fe48), 6 min (TED's player)