Pure maths, physics, logic (braingames.ru): non-trade-related brain games - page 18
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almost 25 cm, imho.
________________________
A --> BAB
B --> ABA
ABA ABA --> B
ABA --> A
almost 25 cm, imho.
No way!)
How many stones in the 2011 urn?
It turns out that the ball returned all the energy to the brick and remained lying there, while the brick flew away.
I'm surprised you ignored Manov's answer - it's almost 2 metres :)
Assuming the masses are equal, where does the energy for the return of the korpik and the lifting of the ball come from?
There is no mention of mass in the problem.
Let's say the masses are equal, where does the energy to return the brick and lift the ball come from?
The energy comes from 'almost'.
The ball in this case is much lighter than a brick, because the word almost in Russian is usually interpreted as "quite a bit". :)
There is no mention of mass in the problem.
Let's assume the masses are equal............
That's not my reasoning.
Let's consider the ball at the moment of greatest compression (when the brick passes its balance point after landing on the ball).
At this point, the ball pushes off the ground and the brick with equal force.
In weightlessness, it would push them off with equal force in different directions, and itself would continue to stay strictly between them in subsequent moments (while they fly off in different directions).
So my answer is "almost 50".
The spring straightens after compression more than its original length (by inertia). But here there is still a brick on the spring. The energy is completely transferred to the ball and is proportional to the mass of the brick. The brick is pulled down also in proportion to the mass of the brick.
Therefore, I got "almost 0 cm". Maybe I didn't take something into account.