How to Write Mathematical Equations on Physics Forums

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Homework Help Overview

The discussion revolves around calculating the kinetic energy of a rocket given its velocity and mass, specifically using the formula Ek = (1/2) mv². Participants are exploring the correct application of this formula and the proper representation of units in their responses.

Discussion Character

  • Mathematical reasoning, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are attempting to apply the kinetic energy formula and are questioning their arithmetic calculations. There is also a focus on how to properly format mathematical equations for the forum.

Discussion Status

Some participants have provided feedback on arithmetic errors and formatting issues, while others express gratitude for the guidance. There is an ongoing exploration of how to correctly present mathematical expressions on the forum.

Contextual Notes

Participants are navigating the forum's rules regarding the representation of units and are referencing external resources for assistance with formatting equations.

csurfus1
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Homework Statement



If the velocity of a rocket is 10 meters per second and its mass is 10 kg, its kinetic energy is:

a. 5000 joules
b. 500 joules
c. 10000 joules
d. 1000 joules


2. Homework Equations [/b)

Ek= (1/2) mv2

The Attempt at a Solution



e=(.5)10x10(2)
E=5000 j
 
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csurfus1 said:
Ek= (1/2) mv2
Good. I assume you mean: Ek= (1/2) mv2

The Attempt at a Solution



e=(.5)10x10(2)
E=5000 j
Check your arithmetic.
 
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Thank you, I appreciate that. I am having a hard time figuring out how to put in the right formulas for this site.

But doing it again, I got 500 j. That right?
 
csurfus1 said:
But doing it again, I got 500 j. That right?
Yep! :thumbs:
 
Except that the unit symbol must be J - not j.
 
csurfus1 said:
Thank you, I appreciate that. I am having a hard time figuring out how to put in the right formulas for this site.

There is an entry in the PF FAQ thread (in the Feedback forum) that describes how to write the mathematical equations here:

https://www.physicsforums.com/showthread.php?t=617567

:smile:
 
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Likes   Reactions: 1 person

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