A bar pendulum is the simplest form of compound pendulum. Consist of a uniform rectangular steel  bar, powder coated ,dimensions  (100x3.75x0.5cm), with holes drilled at regular intervals of 5 cm along its length  for fixing the removable  knife edges. The pendulum is suspended vertically with a horizontal knife edge passing through any one of the holes. The knife edge rests on a plane horizontal rigid support (wall bracket) fixed on the wall. Supplied with wall bracket.