🤔 Diy motor isn’t working, what is the problem with it ?

Cet exercice est un problème ouvert. Il nécessite de prendre des initiatives et de faire des choix dans la modélisation. Des approximations et des estimations sont souvent nécessaires pour arriver à une solution.

A question was posted on Reddit about a DIY1 motor that isn’t functioning properly. The user provides a photo of the motor.

https://www.reddit.com/r/diyelectronics/comments/1hbktoz/diy_motor_isnt_working_what_is_the_problem_with_it/

Write a comment that you could post on Reddit to explain why the motor cannot work as shown in the photo.

Coup de pouce 1
Does the motor looks like a synchronous or DC motor?
Coup de pouce 2
What important part is missing for the motor to work?
  1. 1Do it yourself.