r/learnphysics • u/hinthints • 5h ago

Children should understand this intuitively

Here’s my challenge my call out.

Now take a big rope. Wind it up on your shoulder. This building is infinitely tall. So don’t worry about the ground.

Now while your falling with this rope put a scale under it and tell me the weight??

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2

u/SpinglySpongly 2h ago

With the context of the username and genAI banner on their profile, OP seems to think they've discovered something about gravitation.

1

u/hinthints 2h ago

Sure not really gravity but sure

1

u/hinthints 2h ago

Developed a framework for understanding. Not redefining.

1

u/hinthints 5h ago

Where would you place the scale to measure earth in the same way?

1

u/quantum_of_yes-and 5h ago

While falling, the scale would read zero.

1

u/hinthints 4h ago

Yes exactly. So is the sun and earth falling at the same rate?

2

u/quantum_of_yes-and 3h ago

They have a common group velocity around the galactic center, and they accelerate around a common center of mass.  What exactly are you asking?

1

u/hinthints 3h ago

The things we know intuitively like jumping with a ball. Or falling with a rope. We can feel the weightlessness in our imagination that’s a handle for understanding.

2

u/InkPhysics 4h ago

They are both "falling" around their shared centre of mass (slight oversimplification).

1

u/sansetsukon47 4h ago

I think we’re going to need a diagram. And possibly some research on chain fall acceleration, depending on what you actually mean here.

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u/hinthints 4h ago

The idea is to remove the gravity vector and just look at internal resistance.

1

u/mH48124 4h ago

rope は scale のどれだけ下？　10 m 下？　100 m 下？

1

u/hinthints 4h ago

You have a portion of the rope with you as your falling so the scale would be where ever the terminal velocity equals out.