# Simple Circular Motion question

• StephenP91
In summary, the direction of the centripetal force on a train traveling along a circular track depends on the design of the train's wheels. If the holder is internal, the outer track generates the force, while if the holder is external, the inner track generates the force. The design of the wheels also affects the stress on each wheel, with one factor being the weight of the train. The other factor is determined by the design of the wheels, with internal holders being more common due to their ability to generate centripetal force on the outer track.
StephenP91

## Homework Statement

There is a train traveling along a circular track. Which rail does the centripetal force act on (Inner or Outer) and what 2 factors determine the stress on each wheel.

## The Attempt at a Solution

So I was thinking it might be the outer, but I am not sure and as for the wheels, I imagine one of the factors is the train's weight, as for the other, not sure.

StephenP91 said:

## Homework Statement

There is a train traveling along a circular track. Which rail does the centripetal force act on (Inner or Outer) and what 2 factors determine the stress on each wheel.

## The Attempt at a Solution

So I was thinking it might be the outer, but I am not sure and as for the wheels, I imagine one of the factors is the train's weight, as for the other, not sure.

I would think it's the inner track that provides the Fc. Not sure either.

Stress on the wheels would be the weight of the train and the static friction.

StephenP91 said:

## Homework Statement

There is a train traveling along a circular track. Which rail does the centripetal force act on (Inner or Outer) and what 2 factors determine the stress on each wheel.

## The Attempt at a Solution

So I was thinking it might be the outer, but I am not sure and as for the wheels, I imagine one of the factors is the train's weight, as for the other, not sure.

This is a common train wheel
[PLAIN]http://img690.imageshack.us/img690/3334/14149522.jpg

If the holder is internal (see picture) as in all trains, the track that generates the centripetal force is the outer.
If the holder is external, the inner track generates the centripetal force.

There is a reason why the holder is internal, why ?

Last edited by a moderator:

## 1. What is simple circular motion?

Simple circular motion is a type of motion in which an object moves along a circular path at a constant speed.

## 2. What are the factors that affect simple circular motion?

The factors that affect simple circular motion include the mass of the object, the radius of the circular path, and the speed of the object.

## 3. How is centripetal force related to simple circular motion?

Centripetal force is the force that keeps an object moving in a circular path. In simple circular motion, the centripetal force is directed towards the center of the circular path.

## 4. Can an object in simple circular motion have a changing speed?

No, in simple circular motion, the speed of the object remains constant. It is the direction of the velocity that changes, as the object moves along the circular path.

## 5. What is the difference between simple circular motion and uniform circular motion?

Simple circular motion refers to the motion of an object along a circular path at a constant speed. Uniform circular motion, on the other hand, refers to the motion of an object along a circular path at a constant speed and with a constant centripetal force.

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