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Fc=mv2/r

 
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JB 924  



Joined: 03 Apr 2006
Posts: 607
Location: Hessen, Germany

PostPosted: Tue Jun 06, 2006 2:31 pm    Post subject: Fc=mv2/r Reply with quote

I need help for school. I need to know how to rearange the formula for centripetal force.
I'm an idiot at math and have no clue how to rearrange formulas anymore.
The formula is

F=mv(squared)/r

I would like to know how to do it for velocity and the radius and mass.

Tried googling but none of them show the other ones. And I can't figure
out how to rearrange from the instructions they give.

Thanks a lot, guys


Last edited by JB 924 on Tue Jun 06, 2006 3:29 pm; edited 1 time in total
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seanski44  



Joined: 13 Mar 2006
Posts: 532
Location: Nottingham UK

PostPosted: Tue Jun 06, 2006 2:56 pm    Post subject: Re: Fc=mv2/r Reply with quote

JB 924 wrote:
I need help for school. I need to know how to rearange the formula for centripetal force.
I'm an idiot at math and have no clue how to rearrange formulas anymore.
The formula is

F=mv(squared)/r

I would like to know how to do it for velocity and the radius and mass.

Tried googling but none of them show the other ones. And I can't figure
out how to rearrange from the instructuins they give.

Thanks a lot, guys


OK, a while since I did maths, but here goes...

if F= MV(Squared)/R

You can move the R over to the other side of the equation by timesing both sides by R - thus:

FR=MV(squared)


or move the V over to the other side by dividing both sides by V(squared) thus:

F/V(squared) = M/R


so to get this just for radius (assuming R is radius) simply continue this - to get the R on its own, you need to divide both sides by M, so:

F/MV(Squared) = 1/R

Hope that helps - and anyone else, feel free to correct me...
etc etc...

so
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steeny  



Joined: 24 Nov 2005
Posts: 319
Location: Brisbane, Australia

PostPosted: Tue Jun 06, 2006 2:58 pm    Post subject: Reply with quote

alright, i think i have these right. someone else can check

for radius

multiply by R and divide by F

to get R = mv(sq)/F

for m, then

multiply by R, divide by v(sq) to get

m = fr/v(sq)

and for V, multiply by R, divide by M and take the Square root

v= Sqrt(fr/m)


i think this is all OK. if not, sorry, maths was a while ago for me.

cheers
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tj924  



Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia

PostPosted: Tue Jun 06, 2006 3:04 pm    Post subject: Reply with quote

steeny wrote:
alright, i think i have these right. someone else can check

for radius

multiply by R and divide by F

to get R = mv(sq)/F

for m, then

multiply by R, divide by v(sq) to get

m = fr/v(sq)

and for V, multiply by R, divide by M and take the Square root

v= Sqrt(fr/m)


i think this is all OK. if not, sorry, maths was a while ago for me.

cheers


Same answers I came up with independently, so it MUSt be correct!
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JB 924  



Joined: 03 Apr 2006
Posts: 607
Location: Hessen, Germany

PostPosted: Tue Jun 06, 2006 3:26 pm    Post subject: Reply with quote

Thanks so much, guys!!!
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sequential  



Joined: 18 Nov 2005
Posts: 501
Location: BANNED

PostPosted: Wed Jun 07, 2006 5:26 pm    Post subject: Reply with quote

tj924 wrote:
steeny wrote:
alright, i think i have these right. someone else can check

for radius

multiply by R and divide by F

to get R = mv(sq)/F

for m, then

multiply by R, divide by v(sq) to get

m = fr/v(sq)

and for V, multiply by R, divide by M and take the Square root

v= Sqrt(fr/m)


i think this is all OK. if not, sorry, maths was a while ago for me.

cheers


Same answers I came up with independently, so it MUSt be correct!


Not really both of you guys went to the same school in australia
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