5H10.50 • Spin Magnet

Photo of the Demonstration at the University of Texas at Austin.

Concept conveyed:

• The demo illustrates magnetic attraction and rotational motion.
• The magnet sticks to the glass and spins due to low friction, continuing by inertia and slowing only from resistance. A push adds torque, showing how angular speed can be increased.

Instructions/ Notes:

• Remove the magnet, the base, and the glass from the box.
• Place the base (black on which the magnet rests) on a flat surface.
• Put the glass onto the base so it sits.
• Bring the pointed end of the magnet to touch the glass surface.
• The magnet should stick and begin to spin on its own.
• Optionally, give a gentle push to the magnet; start or speed up the spin.

Staff Notes:

• Make sure surfaces are clean and free of dust.
• Ensure the magnet is balanced (centered) on the glass to avoid wobble. If the magnet is not perfectly symmetrical, it might drift or wobble.

Last updated on September 30, 2025