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So, after a lifetime developing software in all the variations of the C language, and for the last year in Java (specifically JavaFX), I decided that it's time to master the art of developing apps for Android mobile devices.
I bought the Kindle version of "Android Studio 4.2 Development Essentials". I found it to be an excellent starting point as it describes in detail how to configure both your Windows system and your Android phone so that you can write and transfer apps to your phone.
At one point you must convert the phone so it will accept transfers in debug mode from your computer. The moment I did this, the phone declared:
"Congratulations! You are a developer now!"
At last, after 45 years in the business, I am at last a developer!
My assumption from the diagram is that both wheels are held fixed. Although the normal advantage is usually done with a "block and tackle" configuration, as you can see in the wikipedia image, they may be separated.
In the normal Block-and-Tackle configuration, the advantage comes from the lower pulley doing the lifting when it's ropes are shortened and the amount of shortening is proportion to the number of wraps around the pair (usually - 1 for the first wrap over the top wheel). You pull 1m and it shortens the configuration by 1/n m, lifting the weight with a mechanical advantage of n.
If a wheels can move, aside from turning, not evident from the image, it can possibly be a 2:1.
As W∴ Balboos, GHB says, it isn't a pulley problem. It is a moment arm problem. As I attempt to show in this crappy force diagram, if you are lifting a 100 lb weight, the wheel closest to the lifter will be pulling down on the top bar with a force of 200 lb at the wheel connection point, and the pin location will be pulling down on the top bar with a force of 100 lb. That is an incomplete force diagram, but may get you started thinking about the physics.
Not 2:1. The upper wheel and the anchor point do not move upward at the same distance. The difference is because they are along the lever which means the lift will be a function of the distance from the fulcrum and the angle through which the lever moves. That is just the pulleys alone. You also have to take the total length of the lever into account to get the total mechanical advantage.
If you can't laugh at yourself - ask me and I will do it for you.
OK, I'll have a stab (retired aero engineer, if I get this horribly wrong my excuse is that I have been going down the pub for the last 10 years): assuming some approximate dimensions for simplicity
location: Lift pt pulley 2 pulley 1 cable att pivot
distance from pivot: 1 3/4 1/2 1/4 0
fixed/moves: m m f m f
If the lifting lever rises by 1 unit, then the weight rises by the sum of the cable extensions:
* cable att: cable extends by 1/4
* p1 has no effect as it is fixed
* p2 cable extends 3/4 * 2 = 1.5 (this is a pulley effect - cable must extend on both sides of pulley)
So total cable lift is 1.75, ie force at lift point = 1.75 * weight.