Question

please help!!!!!!!!!!!! why we jump from building to the floor u will die? but, why we jump from building on water will not die?

Answer 1

viscosity?

Answer 2

hardness?

Answer 3

or combination?

Answer 4

please help

Answer 5

I think air has low viscosity which means acclamation, hence velocity, is large. ground is harder than water hence greater impulse

Answer 6

but the speed both the same on water or floor

Answer 7

so hardness plays a more important role I guess

Answer 8

ok, do u know website that study physics or can answer it?

Answer 9

Ultimately, the answer is the difference in acceleration.
When you hit the ground with your falling velocity, you decelerate very quickly because the ground doesn't move. This rapid deceleration causes great force, causing death.
When you hit the water with your falling velocity, the water allows you to pass giving less deceleration and less force.

If the question is why the water allows you to pass, then there are different ways of looking at it. Solid vs. liquid would be the simplest. Or, at a more fundamental level, you could talk about the strength of the interactions between the molecules in the solid vs. liquid, but that's likely beyond the level of this question.

Knowing the level of the class you are asking for helps greatly in this situation. The answer is quite different for junior high school than college.

Answer 10

u can show it with formula of physics?

Answer 11

The ground allows for a faster change in momentum, over a very short period of time as compared to water \[F= \frac{mv-mu}{t}\] hence the force you hit the ground with will be much greater than if you landed on water.

Answer 12

we can solve it with energy?

Answer 13

its not about energy its about momentum

Answer 14

i know, but my body change when hit the ground

Answer 15

internal energy?

Answer 16

for solve pro, use dynamics or energy. but i am not clear use energy

Answer 17

when you drop from a building you aren't using any energy, you aren't doing work against gravity, so the work done is negative. Do you have any values to use?

Answer 18

u can solve it use with energy? i know when fall the Po decrease and Ki increase

Answer 19

Yes thats another way but the total energy is still the same and your question asks for an explanation for why you die, i don't recall seeing the word 'solve' anywhere in your question, i don't even understand what you are trying to solve?

Answer 20

i understand that, my body change when hit the ground(internal energy), but hit water is not change . i am not clear how to use equation to solve it?

Answer 21

Please type in the full question

Answer 22

this my idea to ask my seft. not full question

Answer 23

sorry

Answer 24

yr answer the me, but i want to fine anyway

Answer 25

Then if its not a question the method you are trying to make work can't, the net energy is zero since you did no work when dropping, when kinetic energy increases then potential decreases and it remains the same, the best explanation i could give was that of momentum, your energy explanation can't explain why you die

Answer 26

ok, thank u