How to Write Mathematical Equations on Physics Forums

[csurfus1]

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

 

[Doc Al]

Ek= (1/2) mv2

Good. I assume you mean: E_k= (1/2) mv²

The Attempt at a Solution

e=(.5)10x10(2)
E=5000 j

Check your arithmetic.

 

[csurfus1]

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?

 

[Doc Al]

But doing it again, I got 500 j. That right?

Yep! :thumbs:

 

[dauto]

Except that the unit symbol must be J - not j.

 

[berkeman]

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