A wooden beam which is drilled at the centre and at eight equally spaced positions on either side.
Tag - width
Pressure Toadstools
The set consists of five toadstools with stem diameters of 5mm, 10 mm, 12 mm, 15 mm and 20mm, each 10 cm in length. Each toadstool, apart from the 5 mm diameter toadstool, is marked up the stem in 5 mm divisions by means of a self adhesive label, while the diameter and cross sectional area of each stem is clearly marked on top.
Up Hill and Down Dale
Two linked tracks, the slopes of which can be independently varied over a wide range by use of the support bars. The pulley wheel support – bracket is an integral part of the hinge so only one clamp is required to support the equipment on the stand.
Wheelbarrow
Made from 9 mm birch ply, these rods are extremely strong and no reports of any breaking have so far been received.
Gears & Gear Ratios
The board, which measures 24 cm x 8 cm, has four gear trains made up with gears of 10/20, 10/30, 10/40 and 20/40 teeth. This gives gear ratios of 1/2, 1/3, 1/4 and 1/2.