The Gauss Cradle: An Experiment on the Application of Magnetic Potential Energy

Overview

Objectives/Goals The Gauss Cradle uses the concepts demonstrated in both Newton#s Cradle and Gauss Rifle to isolate the magnetic potential energy and measure the maximum amount of energy that could be transferred. For my experiment I wanted to see which combination of magnets and ball bearings transferred the greatest amount of energy. I expected four magnets to produce the best result. Methods/Materials I constructed a cradle, which allowed me to test different combinations of neodymium ball magnets and ball bearings. Velocity and maximum height achieved were measured using a backdrop grid and high-speed camera, recording 60 frames per sec. All experiments were conducted during December 2010 and January 2011. Results The results of the experiment were unexpected. When all four magnets were used, the magnetic force holding the end ball on was greater than the force imparted by the shock wave. The end ball did not leave the group. The best combination was two magnets and two ball bearings. Conclusions/Discussion The conclusion of the experiment was that two magnets and two ball bearings produced the greatest height and velocity, therefore energy. This is because the two magnets give the greatest magnetic potential energy, which can be transferred via the shock wave to the end ball bearing. The ball bearing on the end was held with the least magnetic force and therefore had the most efficient transfer of energy.

Awards (1)

• Honorable Mention

Competition history

• CSEF 2011 Electronics & Electromagnetics · Entry J0915

Resources

• CSEF project summary ↗

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