Spring
This constraint attaches one object to another, as though they were connected by a spring.
Defines the overall strength of the constraint's influence on the object taking all targets in the Targets group into account.
Defines how strong the damping effect is for the spring. Increase the value to reduce the spring's effect.
Targets
Here you can add targets that should control how the object is attached to another by a spring.
Adds a new target including all appropriate settings.
Deletes the last target you added.
Drag and drop the object you want to use as the target into this field.
Controls the strength of the target's influence. This parameter is only available if two or more targets are defined. This is because if only one target is defined, its strength is controlled by the Weight value at the top of the tab. If more than one target is defined, lowering this value means the other targets will have more influence.
Defines the length of the spring, in other words, the distance from the object to the target in the rest state.
Stiffness [-10000000..10000000%]
Defines how easy or difficult it is to stretch the spring. The greater the value, the stiffer the spring.