By how much does your force change the kinetic energy

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Homework Help Overview

The discussion revolves around a physics problem involving the application of force on a blob of gelatin and its effect on the kinetic energy of the center of mass. The original poster presents a scenario where a constant force is applied, and they seek to understand the relationship between work done and changes in kinetic energy.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants inquire about the original poster's specific question and the relevance of concepts like sheer modulus. There are discussions about the work-energy principle and where the work done by the force is directed.

Discussion Status

The conversation is ongoing, with participants seeking clarification on the original poster's question and encouraging them to articulate their confusion. Some guidance has been offered regarding the relationship between work and kinetic energy, but no consensus has been reached on the specific details of the problem.

Contextual Notes

There is mention of the original poster feeling lost and frustrated, indicating a need for further exploration of the problem's concepts. The discussion also highlights the importance of clearly phrasing questions in the context of scientific inquiry.

emily081715
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Homework Statement


You push a blob of gelatin with a constant force of 2.4 F across a wet table on which it slides easily. Because the blob shape distorts, its center of mass moves only 33 mm during the time interval in which the point of application of your force moves 53 mm .
By how much does your force change the kinetic energy of the center of mass?
What is the work done by you on the blob?= 0.127 J

Homework Equations


w=ΔK
ΔK=1/2mv^2

The Attempt at a Solution


w= 0.127 J
 
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Is there a question here?
Does the sheer modulus have anything to do with this?
Can you describe where the work-energy goes?
 
By how much does your force change the kinetic energy of the center of mass?
this is the question
 
That was their question, not yours.
That is the problem you have to solve - you just posted a bunch of stuff and left it to us to guess what you wanted. What was your question? Not theirs, yours.
Please answer my other questions.
 
Simon Bridge said:
That is the problem you have to solve - you just posted a bunch of stuff and left it to us to guess what you wanted. What was your question? Not theirs, yours.
Please answer my other questions.
my question is that i am lost and frusterated with this question and that i need help walking through it to figure out the answer
 
Great! It is best not to make people guess what you want - and phrasing questions is an important part of the scientific method which you are learning.
Can you answer the other two questions in post #2?
 
i've never learned sheer modulus so i don't know. isn't the work going into the geletin
 
Work = force times distance of mass center.
The work is equal to the change in kinetic energy (unless the object starts to rotate or something like that).
 

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