Senior Theses

Publication Date


Document Type

Thesis (Open Access)

Degree Name

Bachelor of Science in Physics



Faculty Advisor(s)

Jennifer Heath (Thesis Advisor)
Joelle Murray & Tianbao Xie (Committee Members)

Subject Categories

Engineering Mechanics | Materials Science and Engineering | Physics


It is extremely common for servers in the restaurant industry to have pint glasses slip off their serving tray, wasting both time and money for the restaurant. I have designed a sleeve attachment that will clip on to the bottom of a pint glass. The metal sleeve attachment will be attracted to a magnet placed into the serving tray. This increases the normal force of the pint glass, resulting in an increase in the friction force between the tray and sleeve attachment, and helping secure the glass to the tray. In order to optimize the design, the value of the static friction coefficient of the materials, as well as the value and influence of the magnet force on the object was measured. This information was used to determine the best material to use in the product, and to predict the effectiveness of the design in preventing the sliding of the glass. Ultimately, a wooden tray and an ABS plastic sleeve were chosen for the design, and a prototype was produced and tested.