Spring Testing Apparatus
The apparatus is a compact metal frame with adjustable feet so the user can make the apparatus level. The back of the frame has a storage area for springs and masses. 
The front of the frame has a metric scale each side of a large slot, where the test spring hangs. It shows students how to find the properties of a spring and proves some basic laws of physics (Hookes law, Newtons law and spring design rules). Students choose a spring and note its dimensions. They then slowly load the spring with the masses (included) and note its extension against the metric scale. The Spring Testing Apparatus uses a fundamental variable mass and scale measurement to test springs. 
It is also a useful tool for a workshop, to check the properties of a spring before it is used, or after it has been used.
Students use their results to find the properties of the spring and compare them with theory and the manufacturers details.
Experiments
•  Spring rate and Hookes law.
•  To prove the basic rules of spring design.
•  A simple spring scale.
•  Springs in series.
•  Springs in parallel.