Question wording, please confirm

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In summary, the conversation discusses the relationship between kinetic energy (KE) and speed (v) of an object, with the statement that KE is directly proportional to v^2. The formula for KE in terms of v is derived, and a clarification is made that one property is proportional to another. The listener thanks the expert for clearing up their confusion.
  • #1
bascially, I'm 100% sure i understod the wording of the question, below, can you please check though i confirm i interpretted right, thnx buddies

Homework Statement



the kinetic energy, E joules, of an object moving with a speed v m/s, is directly proportional to v^2.

the kinetic energy of the object is 15 480 joules when its speed is 6 m/s.

a) find a formula for E in terms of v

Homework Equations



none

The Attempt at a Solution



Ev (proportional sign) v^2
Ev = kv^2
15480 x 6 = k x 6^2
92 880 = k x 36
k = 2580

Ev = 2580 x v^2
E = 2580v




thnx for the help
 
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  • #2
I am curious as to how you came to this conclusion;
Trail_Builder said:
Ev (proportional sign) v^2
 
  • #3
that where i get confused, i kinda thought the question meant that the kin energy times the speed is proportional to the speed squared

either that or I'm totally confused

please help

thnx
 
  • #4
Trail_Builder said:
that where i get confused, i kinda thought the question meant that the kin energy times the speed is proportional to the speed squared

either that or I'm totally confused

please help

thnx
No, not quite. The statement means simply that [itex]E\propto v^2[/itex].
 
Last edited:
  • #5
o rite, i see, thnx for clearing that up, but isn't it E proptional to v squared?

thnx buddy
 
  • #6
The trick (if I understand the source of your confusion) is to learn to partition the sentence correctly.
Trail_Builder said:
the kinetic energy, E joules, of an object moving with a speed v m/s, is directly proportional to v^2.
Try to throw away all non-essential details and extract the thrust of the statement, i.e., some property of some object is proportional to some other property.

Then you can keep track of the details separately...
Some property = KE
some object = "object moving with a speed v"
some other property = v^2

The upshot of this is that one property is proportional to another, namely, KE prop v^2

Perhaps it would help if you read the sentence as though it were written this way: the kinetic energy, E joules, (of an object moving with a speed v m/s) is directly proportional to v^2.
 
  • #7
Trail_Builder said:
o rite, i see, thnx for clearing that up, but isn't it E proptional to v squared?

thnx buddy
Sorry, that was a typo. Now corrected :smile:
 
  • #8
Gokul43201 said:
The trick (if I understand the source of your confusion) is to learn to partition the sentence correctly.
Try to throw away all non-essential details and extract the thrust of the statement, i.e., some property of some object is proportional to some other property.

Then you can keep track of the details separately...
Some property = KE
some object = "object moving with a speed v"
some other property = v^2

The upshot of this is that one property is proportional to another, namely, KE prop v^2

Perhaps it would help if you read the sentence as though it were written this way: the kinetic energy, E joules, (of an object moving with a speed v m/s) is directly proportional to v^2.


o rite eyh that'll be where i was going wrong lol, thnx for that, i understadn now :D
 
1.

What is the purpose of "Question wording, please confirm"?

The purpose of this phrase is to ensure that the participant understands the question and is giving an accurate response. It serves as a prompt for the participant to double check their understanding and confirm that they are providing the requested information.

2.

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As a scientist, it is crucial to have clear and concise data in order to draw accurate conclusions. By using this phrase, researchers can minimize misunderstandings and ensure that the data collected is valid and reliable.

3.

When should I use "Question wording, please confirm" in my research?

This phrase should be used whenever there is a possibility of confusion or misinterpretation in the wording of a question. It is especially important in surveys or questionnaires where participants may not have the opportunity to clarify their responses in person.

4.

Can "Question wording, please confirm" affect the results of my study?

Yes, the wording of a question can have a significant impact on the responses received. By using this phrase, researchers can minimize the potential for biased or inaccurate data and increase the validity of their results.

5.

Is there an alternative to using "Question wording, please confirm"?

While there are other ways to ensure clear understanding of a question, such as using multiple choice or providing examples, using this phrase is a simple and effective method. It allows for flexibility in the wording of questions while still promoting accurate responses from participants.

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