State-of-the-art Engineering Equipment

EM-213.02 | Compound Pendulum Apparatus

  • Experiments on pendulum swings, comparison of physical and mathematical pendulums
  • Rod pendulum as physical pendulum, made of metal and mounted on knife-edge bearing
  • Knife-edge bearing mounted to slide on the rod to effectively vary the pendulum length
  • Weight for the rod pendulum, sliding
  • Gravity pendulum as a mathematical pendulum
  • Adjustable length of the gravity
  • Stopwatch to measure the oscillation period
  • Bracket for wall mounting
  • LxWxH: 250x80x2000mm
  • Weight: approx. 5kg
Technical Specification
Pendulums perform oscillations. Gravity produces the restoring moment. We distinguish between mathematical and physical pendulums. A mathematical pendulum describes an idealised gravity pendulum. In physical pendulums, the shape and size of the pendulum body is taken into account. Both are theoretical models for the description of a real pendulum. The unit is used to study pendulum swings. A gravity pendulum (mathematical pendulum) and a rod pendulum (as a physical pendulum) are compared to each other. The unit contains a metal rod with a movable auxiliary mass as the rod pendulum. The suspension point can be adjusted on the knife-edge bearing of the pendulum. The length of the gravity pendulum can be easily changed using a clamping device. The experimental unit is designed to be fixed to a wall.
Learning Objectives
  • Oscillation period of gravity and rod pendulum
  • Determine center of gravity on the rod pendulum
Gravity pendulum
  • length: up to 2000mm
  • nylon rope
  • weight
  • diameter: 50mm
  • mass: 0,52kg
Rod pendulum
  • length:1000mm
  • diameter: 8mm
  • mass: 0,39kg
  • pendulum weight
  • diameter: 50mm
  • mass: 0,49kg
Stopwatch: 1/100s Measuring tape: 3m