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1.James O'Connell, “Dynamics of a medieval missile launcher: The trebuchet,” Phys. Teach. 39, 471473 (Nov. 2001).
3.See, for example, the Real World Problems Trebuchet Simulator ( and the Atreb and FAT/F2K Simulators (
4J. Ginsberg, Advanced Engineering Dynamics, 2nd ed. (Cambridge University Press, New York, 1995), pp. 282297.
5.C. Lanczos, The Variational Principles of Mechanics, 4th ed. (Dover Publications, New York, 1986), pp. 111147.
6.E. J. Haug, Computer-Aided Kinematics and Dynamics of Mechanical Systems, Volume I: Basic Methods (Allyn and Bacon, Needham Heights, MA, 1989).
7.Christopher Deacon, “The importance of graphs in undergraduate physics,” Phys. Teach. 37, 270274 (May 1999).
8.Silvina Guidugli, Cecilia Fernández Gauna, and Julio Benegas, “Graphical representations of kinematical concepts: A comparison of teaching strategies,” Phys. Teach. 43, 334337 (Sept. 2005).
10.Alan Van Heuvelen and Xueli Zou, “Multiple representations of work–energy processes,” Am. J. Phys. 69, 184194 (Feb. 2001).

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The trebuchet has quickly become a favorite project for physics and engineering teachers seeking to provide students with a simple, but spectacular, hands-on design project that can be applied to the study of projectile motion, rotational motion, and the law of conservation of energy. While there have been free trebuchet simulators and range calculators available online for several years, these have been limited to simple designs. Other simulators are available for a fee, precluding practical use in introductory courses. With this in mind, one of the authors developed a free web-based trebuchet simulation that can be found at This simulation, named Treb-Bot, is designed to be visually appealing to high school students and includes simulations of trebuchet designs that are unavailable elsewhere on the web. The website was successfully field-tested by a group of Advanced Placement Physics 1 students.


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