Pendulum Simple Steel

This apparatus demonstrates that bodies of different density or mass fall through a given distance in the same time in the absence of atmospheric drag

a) Glass tube 600 x 20 mm, fitted with two solid rubber bungs, one carrying 8 mm dia rubber tube with clip for vacuum connection.
b) Same but Glass tube 600 x 50mm dia
c) Same as (a) but with stopcock and can be fitted directly on pump plate

It comprises a wooden friction board 480 x 75 x 18 mm, a wooden slider with hook 140 x 70 x 18 mm, a plain aluminium slider and an aluminium slider with rubber backing, an additional long aluminium slider is provided which fits over the friction board to provide an alternative surface type