Mechanics Projectile / Coriolis Effect

Ted123
Messages
428
Reaction score
0

Homework Statement


[PLAIN]http://img232.imageshack.us/img232/82/mechanics.jpg


Homework Equations





The Attempt at a Solution



Where to start?
 
Last edited by a moderator:
Physics news on Phys.org
Welcome to PF!

Hi Ted123! Welcome to PF! :wink:

Start with the definition of Coriolis force …

2m u x Ω :smile:
 


tiny-tim said:
Hi Ted123! Welcome to PF! :wink:

Start with the definition of Coriolis force …

2m u x Ω :smile:

Can you elaborate on this as I'm not at all sure where the method's taking me - I haven't seen that definition before!
 
Ted123 said:
Can you elaborate on this as I'm not at all sure where the method's taking me - I haven't seen that definition before!

What definition of Coriolis force have you been using?

(and btw, what approximate formula will you be using for the time of flight?)
 
tiny-tim said:
What definition of Coriolis force have you been using?

(and btw, what approximate formula will you be using for the time of flight?)


Actually, I tell a lie: I've seen it like

{\bf {text F}_{coriolis} = -2m(\omega \times {\bf u} )

I've also seen the formula:

D' {\bf x} = D {\bf x} + \omega \times {\bf x}

mD^2{\bf x} = m{\bf g}

and \displaystyle{\bf x}(t) = {\bf x}(0) + {\bf u}t + \frac{1}{2} {\bf g}t^2 + {\bf u} \times \omega t^2 + \frac{1}{3}{\bf g} \times \omega t^3
 
Hi Ted123! :smile:

Well, the last formula looks correct, but you'll never remember it for the exam! :rolleyes:

so can you prove it (from 2m u x ω)? :wink:
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
Back
Top