At first glance, this puzzle looks like a simple question about which rope is holding the ball.
But there are several ropes, several moving bars, and more than one possible point of movement.
That makes it easy to choose the wrong answer if you only look at which rope seems closest to the ball.
The key is to follow the structure carefully and ask one simple question: Which rope is actually helping to keep the ball on the raised end of the bar?
Let’s look at the puzzle step by step.
The most important idea here is balance and pivot points.
A bar can rotate around a fixed point, called a pivot.
When one side of the bar is supported by a rope, that rope can prevent the bar from rotating.
If the rope is cut, the force holding that side disappears.
The bar may then rotate, causing anything resting on it to move.
This is exactly what we need to look for in this puzzle.
What About Rope S?
Rope S is connected to the upper bar on the left side.
It helps support that bar by connecting it to the higher point on the vertical structure.
If S is cut, the upper bar can change its position.
That movement may also affect the rope labeled P.
However, this entire mechanism is on the left side of the puzzle.
The ball is sitting on a completely different bar on the right.
There is no direct connection that would make cutting S immediately release the ball.
So S is not the answer.
What About Rope P?
Rope P connects the left side of the upper bar to the left side of the lower bar.
It looks important because it connects two different moving pieces.
If the upper bar moves, P may become loose or change its tension.
But again, P belongs to the left-hand mechanism.
The ball is not resting on either of those bars.
Even if the left side moves, that does not directly remove the support underneath the ball.
So P can also be eliminated.
What About Rope H?
Rope H is attached to the lower bar on the left side.
Its job is to help support one end of that bar and prevent it from rotating freely around its pivot.
Cutting H would allow the left mechanism to move.
But the ball is still on the separate mechanism to the right.
The important thing to remember is that movement in one part of a machine does not automatically make another part move.
There must be a physical connection that transfers the movement.
In this puzzle, H does not provide that connection to the ball.
So H is not the answer either.
Now Look Closely at Rope Y
Rope Y is different.
It is directly connected to the bar that is holding the ball.
The right-hand bar has a pivot near its middle.
One end of the bar carries the ball, while rope Y helps support the other side of the structure.
As long as Y is holding its position, the bar can remain balanced.
The ball stays on the raised end.
But imagine cutting Y.
The support from the rope suddenly disappears.
The bar is no longer held in the same balanced position.
Because the ball adds weight to the right side, gravity pulls that side downward.
The bar rotates around its pivot.
As the ball-carrying end moves downward, the ball loses its support and falls.
That is the key to solving the puzzle.
You do not need to follow every possible movement on the left side.
You only need to identify which rope is directly supporting the mechanism carrying the ball.
The Final Answer
So, which rope should be cut to drop the ball?
The correct answer is Y.
Cutting Y removes the support from the right-hand lever, allowing it to rotate downward under the effect of gravity and causing the ball to fall.
The other ropes control parts of the left-hand mechanism, but they do not directly release the ball.
That is why this puzzle is a good reminder that when solving mechanical puzzles, the most important thing is not simply to look at what seems closest.
Instead, follow the pivot, the support, and the direction of movement.
Once you do that, the answer becomes much easier to see.
