Demos by PIRA

1J10 Finding Center of Gravity

  1J10.09Rotation about the center of mass: Object to throw.
  1J10.12Irregular shapes to determine center of mass using plumb bob.
  1J10.26Center of mass of a baseball bat

1J11 Exceeding Center of Gravity

1J20 Stable, Unstable and Neutral Equilibrium

1J30 Resolution of Forces

  1J30.10Car hangs balanced by forces in mid-air over removable inclined plane.
  1J30.51Force table: Forces on a car on an adjustable inclined plane.
  1J30.53Force table: Forces on a car on a horizontal table.

1J40 Static Torque

  1J40.15Torque wrench to demonstrate.
  1J40.20A meterstick lever on a free-standing fulcrum with weights.
  1J40.25Precision lever: Balance beam on stand plus weight set.
  1J40.70Forces on crane boom measured with transducer.
  1J40.75Anatomical models: Skull, Arm, Leg