Creates a new constraint between two physics objects. You probably only want to do this once, on Play.

More details in this page » Constraints

Notes

Have you ever heard of hydraulics and motors? If not then let me explain it to you and the connection of it in this script ;

Hydraulic and Motors , are both type of motors that produces different movements using either similar or different elements:

• Hydraulic – from the word hydro , it usually uses fluids (either water or air) to produce Linear Motor movements can also be achieved with the use of gears and Rotary Motor in real life.
• Motor – the most common motor we know , it produces rotary movements , in fancade we can produce something like it with the help of constraints and Angular Motor

So to be exact constraints are basically a physics in relation to motors , pivotals , gears and springs!!!