"This set of apparatus includes:
-1 spring which can stretch up to 8cm. There is a hook on both sides
-1 meter ruler
- 5 mass of metal weighing 50 ,10 100 grams.
- A metal sphere of diameter 20 mm with the handle tied radio wire, 1.5 m long
- A metal base with 1m.
- C-clamp, there is a lock at the end, the height is adjustable
- Spring with diameter of 15 mm. 20mm. long.
- Screw attached to a metal pole with a handle 10 cm. in length"