Kinematics tracer cart

This is cart for Physics Demonstration/Experiment.

It's helpful as a tool for investigating Velocity, acceleration and more Kinematic aspects.

There are 2 builds for the cart one with big motor and second with a small one.
the big one works better

to build it you will need:

1. DC Motor there are 2 versions Small 20mm and Big 24 mm.
2. Electric toggle switch
3. skewer 5 mm diameter
4. 3XAA Battery holder
5. Electric wires
6. Some Super glue and Backing soda.
7. A 20 Ohm Potentiometer (If you want to control the timing of the dotes)
8. foam paper for the wheels.

Motors:
Small:
https://he.aliexpress.com/item/1005001333622252.html?spm=a2g0o.productlist.0.0.778d28515S7roR&algo_pvid=5eb0cf27-de91-42e0-a5f5-1634c8f81c56&algo_exp_id=5eb0cf27-de91-42e0-a5f5-1634c8f81c56-3

Big
https://he.aliexpress.com/item/1005001579180797.html?spm=a2g0o.productlist.0.0.2cad3c86oWtDWo&algo_pvid=9f1ee5af-7d99-4cb1-8d6b-d72cdc0b922c&algo_exp_id=9f1ee5af-7d99-4cb1-8d6b-d72cdc0b922c-2

skewer
https://he.aliexpress.com/item/32817919737.html?spm=a2g0o.productlist.0.0.2d5e58806g4PSz&algo_pvid=978467cf-9be2-432f-8946-953a93c80367&algo_exp_id=978467cf-9be2-432f-8946-953a93c80367-19

Electric toggle switch
https://he.aliexpress.com/item/1005001814881632.html?spm=a2g0o.search0304.0.0.6dc46d9cbDTRzx&algo_pvid=2718a7b9-5ab7-46fa-9374-b1bb04e36f5a&aem_p4p_detail=202107311316425715027901261570009460354&algo_exp_id=2718a7b9-5ab7-46fa-9374-b1bb04e36f5a-3