Calculate cangular momentum vector L

[classicphysic]

Homework Statement

calculate the angular momentum vector L

Homework Equations

r = rr(hat) r=√(xsquared + y squared) r(hat) = <cosθ, sinθ>
v = r(dot)r(hat) + rθ(dot)θ

The Attempt at a Solution

L = mv X r

I don't know m, how can i calcuate L? please help me

 

[tiny-tim]

welcome to pf!

hi classicphysic! welcome to pf!

L = mv X r

I don't know m, how can i calcuate L? please help me

yes, you do need m!

so just call it "m", and leave it in the answer ​

 

[classicphysic]

i am waiting for the help people...checking it every hour but no body answers it

 

[DeIdeal]

tiny-tim answered you already!

so just call it "m", and leave it in the answer

What more do you need?

And I really don't think this counts as "Advanced Physics". So, wrong forum?

 

[tiny-tim]

hi classicphysic!

i am waiting for the help people...checking it every hour but no body answers it

posting it when the americans are about to go to bed, and the europeans are fast asleep :zzz:, isn't the best time, if you want a quick answer

(and posting it in the right forum would make it more likely that the right people see it)

btw, you don't need to keep checking … you should receive an email notification of each new post in any thread you've posted in