What uses elastics as a means of shock absorber?
A shock absorber usually uses two complimentary processes: spring action and dampening action. A spring absorbs shock, but it oscillates, changing kinetic energy (the shock) to potential spring energy, and restoring it back to kinetic energy (the bounce back). The damper turns kinetic energy into heat using friction–it can use a fluid or air or just two solids rubbing on each other. A spring alone keeps oscillating and is not a good shock absorber. A damper alone absorbs shock once, but does not return back to its original position to absorb another shock. The combination of the two in the right proportions creates a critically damped shock absorber that turns the energy into heat and returns back to position to absorb the next shock. Elastic usually exhibits more spring properties than dampening properties. Some bike shock absorbers contain rubber rings or bands, but they also have a friction mechanism to make the ride less springy. Larger vehicles usually use metal springs combined
