[Yahya A.Sharif (OP)]

His model says a person who weighs 50 kg will weigh something like 80 kg the instant they die. 

They weigh the same. This not part of my theory.

[Bored chemist]

His model says a person who weighs 50 kg will weigh something like 80 kg the instant they die. 

They weigh the same.T

Make up your mind.

The force your ankles/ calves need to exert to lift you is your weight.

You say that, by magic, that force is less than your weight because living tissue is magically easier to lift.
But when it dies, the magic stops.
So it must weigh more.

[Yahya A.Sharif (OP)]

You say that, by magic, that force is less than your weight because living tissue is magically easier to lift.
But when it dies, the magic stops.
So it must weigh more.

I did not say this. It was an intuitive conclusion. Both the dead and alive body should lift with force less than weight but a dead doesn't have force in its muscles so it is just an object..

[Origin]

His model says a person who weighs 50 kg will weigh something like 80 kg the instant they die. 

They weigh the same. This not part of my theory.

Then why did you say this?

The physics of forces works the same for both living and non-living systems. What, do you think the human body suddenly becomes heavier when they die or something?

Yes.

It doesn't really matter since this whole thing is an completely absurd conjecture anyway.

[pzkpfw]

Yahya A.Sharif, do you have access to:
1. Scales to stand on, analogue preferred over digital
2. A phone or other device to film the scales (preferably held steady on a stand or by another person)
3. A bottle of around 2 litres capacity (to be filled with water), or some similar weight
If so, I would like to propose a very simple test you can do.
(I hope I will not repeat what someone else has proposed)

[Bored chemist]

It was an intuitive conclusion.

Your intuition is wrong.

Both the dead and alive body should lift with force less than weight

That brings us back to the question of a bottle of water.
Most of your body is water.
Does the water you drink change how much it ways while it is part of your body?

[Yahya A.Sharif (OP)]

Most of your body is water.
Does the water you drink change how much it ways while it is part of your body?

I do not know what part of the body is considered as human. But the water drunk makes a difference

[Yahya A.Sharif (OP)]

What is the extra x kg? What is its value and why? no
scientist knows that.I discovered it. I know it. I explained it.

[Bored chemist]

What is the extra x kg?

It is a dream of yours.
It is not a real thing.
That's why science ignores it.

[hamdani yusuf]

The idea is crazy try to think of this: my body is 60 kg and when I lift it I must exert the same force I exert to lift a heavy rock of 60 kg but I move or lift lighter body of say 20 kg even though it should be heavy like the rock.
I think like this can be thought of : people are familiar with lifting or moving heavy loads do you think you really jump, dance , walk, run, walk upside down,etc doing these with a load of your body 70 kg?

How many times can you do pull ups?
How much additional weight can you carry while pulling your own body up?

[Yahya A.Sharif (OP)]

How many times can you do pull ups?
How much additional weight can you carry while pulling your own body up?

As the load on the feet when lifting is small the movements can remarkabley be many
The feet muscles must bear both the body and the object it bears the body with small force adding to it the weight of the object. The object weight doesn't change

[Bored chemist]

How many times can you do pull ups?
How much additional weight can you carry while pulling your own body up?

As the load on the feet when lifting is small the movements can remarkabley be many
The feet muscles must bear both the body and the object it bears the body with small force adding to it the weight of the object. The object weight doesn't change

You did not answer the questions.

[hamdani yusuf]

I think this video is related to the topic of discussion here.

You can have weight without gravity. You can be weightless in gravity! Weight is not the same as gravity. Then what is weight?

[Bored chemist]

Weight is not the same as gravity.

Nobody said it was.

Then what is weight?

Weight isn't very well defined. That's why scientists talk about masses and forces.

[hamdani yusuf]

Nobody said it was.

I'm pretty sure someone has said that weight equals mass times gravitational acceleration.

[Yahya A.Sharif (OP)]

Then what is weight?

Weight is the gravity force mg on the scale by your body mass m where the only forces on the scale are gravity force by your body and the  normal force by the scale, if forces change as in the video then it is not weight. Weight is a standard of how a human  loses or gains body mass m, if g is constant weight mg can be equivalent to mass m the scale shows the mass m in kilograms

[Bored chemist]

Nobody said it was.

I'm pretty sure someone has said that weight equals mass times gravitational acceleration.

Often, but not always.
It's more complicated than that.

[Bored chemist]

if g is constant

It isn't.

[Yahya A.Sharif (OP)]

if g is constant

It isn't.

You need to understand that g in elementary physics is a number 9.8 m/s² before you reply

[Bored chemist]

You need to understand that g in elementary physics is a number 9.8 m/s² before you reply

LOL
It's not a number.
It's a value.
You can tell because it has units.

And it's not constant.
https://web.archive.org/web/20110605043202/http://ethesis.helsinki.fi/julkaisut/mat/fysik/vk/virtanen/studieso.pdf