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Home > Torsion Ballista

Torsion Ballista

SKU: W37517
A Pitsco Exclusive


Inspired by the ancient Greek and Roman ballistae, this kit uses torsion on both sides of the bow arm to fling Styrofoam balls across the classroom! Great for demonstrating how torque can be applied to create power as well as potential and kinetic energies and projectile motion.

Order 30 kits to build a class pack!


Type: Project Kits Grades: 6-12


What You'll Get

  • 2 basswood sheets with laser-cut parts
  • Paper clip
  • 4 screws
  • Yellow twine
  • 2 Styrofoam balls (projectiles)
  • Torsion Ballista Kit User Guide

Learning Values

  • Force and motion
  • Potential energy
  • Projectile motion
  • Torsion
  • Data collection
  • Historical perspectives
  • Systems
  • Modeling
  • Prediction
  • Technological design
  • Graphing
  • Measurements
  • Ratios


  • Tools and Materials Required: Small screwdriver, white glue, scissors, and ruler
  • Assembly Method: Gluing and screwing
  • Material: Laser-cut basswood
  • Dimensions: 6" x 7" x 3-1/8"

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