EISCO PH0323A Hooke's Law Apparatus for Student Use - Supplied Without Weights This complete apparatus has a 15cm adjustable scale which helps to prevent parallax error. The scale is marked in millimetres and mounted on sturdy 30cm support rod and a wooden base. A hook supporting a coiled spring with a mass hanger and indicator is attached to rod. * Includes hanger Only * Weights are extra, each weighing 10g, for a total of 100g. * Weights Code is PH0323B. * Product With Weights and Hangers, One can order PH0323A+B. * Ideal for demonstrating Hooke's Law which states the force needed to extend or compress a spring by some distance is proportional to that distance * Manufacturers Code - PH0323A https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2024-11-12 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2025-04-07 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2025-05-25 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2025-08-11 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2026-05-07 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2026-07-13 https://elecena.pl/product/27244000/eisco-ph0323a-hooke-s-law-apparatus-for-student-use-supplied-without-weights 2026-09-22