# Homework Help: Direction of coriolis force

1. Dec 13, 2011

### buzzing

1. The problem statement, all variables and given/known data

A rotating ball with rotational angular velocity ω= (0,0,ωz) . What is the direction of the coriolis force with the following velocities: Va = (Vx, Vy,0) ; Vb= (Vx, 0,Vz)

2. Relevant equations

All i know about coriolis force is F= 2m(vχω). The question even doesn't say any angles. So i am not too sure if the question is right.

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Dec 14, 2011

### ehild

The Coriolis force is 2m times the vector product v x ω. Recall how to obtain the vector product using coordinates.

ehild

3. Dec 14, 2011

### buzzing

the vector product only gives a multipication of co ordinates but doesn't give the direction though.

4. Dec 14, 2011

### ehild

The vector product gives the coordinates of the product vector. You can find from the components what angles the force vector enclose with the axes.
Show what you got for the Coriolis force in case of both velocities.

ehild

Last edited: Dec 14, 2011
5. Dec 14, 2011

### buzzing

The two product for each velocity i got is (-WZVy,WzVx,0). and the next one is (0,WzVx,0).

Thanks for replies ehlid!!

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