Heavy hub pendulum...

[iacob alex]

  .....is imagined to make slow a swinging motion,to retard it.

      The bob-rod torque will rotate the heavy hub.

      The heavy hub is working as a resistance and power storage system,in thew same time.

      Simply,we slow down the gravity fall of bob,between two gravitational levels (potential energy) and store this motion in a rotational inertia "basin") kinetic energy).

      Why? Maybe, we can use this  "vague" idea further...for our topic.

        All the best! / Alex

[iacob alex]

  .....in a certain way,can be considered a "relative" of a hour-glass (container in which sand drops through a narrow passage,formerly used to measure time),or a clepsydre,if we have in mind to measure time,due to fall of the "stuff" in gravity.

      Also,the heavy hub pendulum can be considered an "extreme" imaginable pendulum.

      The same image "meets" an another imaginable simple machine,a class 2 lever,if the load moves in the pivot point,as a heavy mass ,and the effort is the gravity fall of a mass at the other  end of the bar/stick..

      So,a certain pendulum comes face to face,with a particular lever in a common image...

     Can be this useful to our topic?!   Maybe...

        All the best! / Alex 

[iacob alex]

.....for the present moment,is an abstract idea,but a possible real "clepsydre" of time (and motion...especially!),also.

    We can make easy a correspondence between a heavy hub pendulum ,and a natural PM (that cannot be refuted!) :

       -Sun /fulcrum,pivot.

       -Earth/great mass,central massive point,heavy hub.

       -Moon-satellite/pendulum's bob.

       - constant distances/gravity links.

    Anyway,if we "fly around" the Atwood machine with a heavy pulley,in my opinion,we can have a certain starting point,to imagine a real,small "copy" of the natural PM.

       All the best ! / Alex