"Forces" would be (Force against a Lever is where it's applied, not where it originated)
Left Hand
Right Hand
Left Arm (Centrifugal, Blast-Off the Chest)
"Weight" would be
Golf Club
Clubhead
This is really interesting stuff because we can generate force from multiple sources and we can change the length of the Lever and control the input-output of the Force.
For Swingers, we're concerned with acquiring and applying force to move the Primary Lever and use CF to move the Secondary Lever. The Primary Lever is a very long Lever and it takes a lot of force and much more force as the Golfclub gets longer.
I really like to use golf club as the weight....but then if we use this is the load(weight) then what is the lever? The left arm by itself or can it be the top part of the shaft + left arm?
If will use the left arm by itself as the lever then the pivot can be the force......the left shoulder is the fulcrum and the pivot is connected to the left shoulder.
If you use the concept of the top part of the clubshaft and left arm as the lever then the right hand or left hand can be used as the source of force.
There's an argument that can made that LEFT ARM BY ITSELF can be the lever.
The Lever uses a pivot point to multiply the force that can be applied to move a load. This is mechanical advantage. A form 1 Lever can move heavy loads with less effort, while a Form 3 Lever can move a Load faster than normal. You can swing a Clubhead faster than you can throw it.
I think that you can view the "counterweight trebuchet" as a dual lever: Form 1 and Form 3 while a Crowbar is Form 1 only.
The Golf Swing is dual Form 3. We don't have a choice. We also don't have much of a choice determining where the Force is Applied but we have more options in determining the source of the Force.