Torsion Pendulum

A torsion pendulum is a device that measures rotational motion and torque. It consists of a mass attached to a wire or rod that twists when rotated. When you rotate it, the wire resists the twisting due to its stiffness, creating a restoring force that causes the pendulum to swing back and forth around its equilibrium position. By analyzing the period of these oscillations, scientists can determine properties like the material's torsion coefficient or even measure tiny forces and gravitational effects. It's a precise tool used in physics experiments to study rotational dynamics and fundamental constants.