EGG drop with elastic potential energy.

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Homework Help Overview

The discussion revolves around determining the height from which an egg can be dropped using an elastic band without hitting the ground. The problem involves concepts of elastic potential energy (EPE) and gravitational potential energy (PE), with specific focus on the relationship between these energies and the spring constant (K) of the elastic band.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore how to calculate the height for dropping the egg while considering the elastic potential energy of the band. Questions arise about how to find the spring constant (K) and whether empirical measurements or mathematical calculations are more appropriate for determining K.

Discussion Status

Participants are actively discussing methods to find the spring constant and the implications of their findings on the drop height. There is a suggestion to conduct multiple drops to gather data, while others consider the mathematical approach to calculate K. No consensus has been reached on the best method yet.

Contextual Notes

Participants mention the need to test the elastic band over a range of heights (2 to 6 meters) and question whether the spring constant remains linear across this range. There is an emphasis on the importance of accurate measurements to ensure reliable results.

Asubach
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Hi I am trying to find at what height i need to drop a egg from 2-6 meters. We will start with 2 meters. The weight of the egg and device holding the egg is .11kg together. I no the formulas for EPE and EP " EPE=1/2KX^2 AND PE=mgh. The question is now how to find where on the elastic band to hold from 2 meters above the ground without hitting the ground! "CLOSEST THE BETTER"

Thanks
 
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Asubach said:
Hi I am trying to find at what height i need to drop a egg from 2-6 meters. We will start with 2 meters. The weight of the egg and device holding the egg is .11kg together. I no the formulas for EPE and EP " EPE=1/2KX^2 AND PE=mgh. The question is now how to find where on the elastic band to hold from 2 meters above the ground without hitting the ground! "CLOSEST THE BETTER"

Thanks

At what point will you exhaust all the initial potential energy of the egg with the potential energy of the rubber band?

Of course you need to know the value of K.
 
LowlyPion said:
At what point will you exhaust all the initial potential energy of the egg with the potential energy of the rubber band?

Of course you need to know the value of K.


Hi thanks for the response! But that is one of my question as well how do i find value of K? And I will be dropping the egg and holding the elastic band at 2.0 meters.
 
Asubach said:
Hi thanks for the response! But that is one of my question as well how do i find value of K? And I will be dropping the egg and holding the elastic band at 2.0 meters.

Then you have to determine it by dropping it and finding what length of elastic stretches how much. It's the how much you're interested in given how high the egg is when dropped that gives k.
 
LowlyPion said:
Then you have to determine it by dropping it and finding what length of elastic stretches how much. It's the how much you're interested in given how high the egg is when dropped that gives k.

Should I drop it 4 to 5 time for all of the given distances that I was given and then find the average? "2-6 meters" Or can you solve it mathematically? K=F/X and find K then find how many Newtons? Then plug K into the ELE?
 
Asubach said:
Should I drop it 4 to 5 time for all of the given distances that I was given and then find the average? "2-6 meters" Or can you solve it mathematically? K=F/X and find K then find how many Newtons? Then plug K into the ELE?

To be sure that k was linear over the range 2 to 6 then you would need to do it for those and if you got the same value for k at both distances then you might reasonably surmise that it was linear. Once you determine k then in theory you should be able to calculate how far it will stretch for any height dropped within that range.
 

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