Which widget should I start with?

The projectile launcher, unless the lesson is a free-body diagram, an incline, or a collision. Each widget page has its own snippet.

Embed in Canvas

Embed a simulation in Canvas

Edit the Canvas page, switch the editor to HTML, and paste the snippet. If the theme crops the widget, raise the iframe height to 640 for a simulation or 560 for a teaching calculator.

Pick a simulation on the widgets hub, or start with the projectile launcher widget. Classroom notes: teachers. Guide: projectile motion.

Steps

Copy the snippet from the widget page, caption included.
In Canvas, edit the page or assignment and open the HTML editor.
Paste, save, and check the widget on a student view.

Projectile snippet to paste

<iframe
  src="https://www.physicslearn.org/embed/projectile-launcher"
  width="100%" height="640" style="border:0"
  title="Projectile launcher"
></iframe>
<p style="font:14px/1.5 system-ui,sans-serif;margin:.5rem 0 0">
  <a href="https://www.physicslearn.org/interactives/projectile-launcher?utm_source=embed&utm_medium=referral&utm_campaign=embed-simulations">Projectile launcher</a>
  by <a href="https://www.physicslearn.org/?utm_source=embed&utm_medium=referral&utm_campaign=embed-simulations">PhysicsLearn</a>
</p>

Other hosts: Google Sites, Schoology, Moodle, WordPress, Notion.