# Homework Help: Archived Centripetal force and Coriolis force?

1. Jun 9, 2013

### Loai27

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

Suppose that you are on a rotating platform, going around with frequency w a distance
r from the center. Suppose that you are watching an object that moves in a straight line.
Produce an animation that shows the position of the object from your perspective. Does
this object seem to be experiencing a force?

Note: I have an idea of what's happening but how would I go about creating this simulation?
Is my attempt right? Is it the Coriolis effect?

3. The attempt at a solution

yes this object will experience a force = m* w^2 *r;

that is centripetal acceleration which is the pseudo force experienced on the object of mass m.

2. Feb 5, 2016

### haruspex

The question is unclear. Is the origin of the reference frame going in a circle but maintaining a constant orientation, or is the reference frame also rotating?
Either way, the observed object will not appear to have constant velocity, therefore will appear subject to a force. However, the nature of that force will be somewhat complex. It is not a simple centrifugal or coriolis force. In the nonrotating frame, the apparent path will be a cycloid of some sort (could be prolate or curtate). For the rotating frame, some kind of double spiral.

As to centrifugal versus Coriolis, centrifugal force arises when the observer moves tangentially to the axis of rotation of the reference frame, while Coriolis arises when the observer moves radially with repect to the axis of the rotating frame.