# Homework Help: Centripetal Acceleration of North Pole

1. Oct 27, 2008

### lacar213

1. The problem statement, all variables and given/known data
Consider the radius of the Earth to be 6.38×106 m. What is the magnitude of the centripetal acceleration experienced by a person (a) at the equator and (b) at the North Pole due to the Earth's rotation?

2. Relevant equations
a = V^2 / r

3. The attempt at a solution
I drew a diagram of what the problem describes but how do you get the acceleration without knowing the velocity?? Would it have something to do with angular speed??

2. Oct 27, 2008

### Staff: Mentor

Exactly. You can express the centripetal acceleration in terms of angular speed. (How does angular speed relate to velocity for circular motion?)

3. Nov 12, 2008

### lacar213

4. Nov 12, 2008

### lacar213

Wouldnt you need to know the time for angular velocity?

5. Nov 12, 2008

### Staff: Mentor

Radians/sec are certainly the units for angular velocity, but I was thinking of the relationship between angular velocity and tangential velocity. Read this: http://hyperphysics.phy-astr.gsu.edu/HBASE/rotq.html#avel"

What's the angular velocity of the Earth's rotation?

Last edited by a moderator: Apr 23, 2017