# Homework Help: Carousel Physics Homework

1. Apr 24, 2010

### Alcape

1. The problem statement, all variables and given/known data
If a designer finds through research of accident reports at a hospital that children
under 5 can usually survive a fall of 1 m without serious injury, what is the
maximum safe turning speed for a carousel to be used by children of this age?

2. Relevant equations
No Idea

3. The attempt at a solution
I don't know how to start

2. Apr 24, 2010

### tiny-tim

Welcome to PF!

Hi Alcape! Welcome to PF!

I'm as confused as you are

most of the question seems to be missing.

The carousel can be dangerous either because the centripetal acceleration is too much for the brain, or because the child might fall off and hit something.

But, for both, you need to know the radius (and you don't).

3. Apr 24, 2010

### Alcape

Thanks For that tiny-tim I thought their may have been a formula I didn't know of. I appreciate your prompt reply. Thanks again.

4. Apr 24, 2010

### Alcape

Thanks for replying I now have an answer If you use the formula v = √(2gs)
where v is the velocity g is the acceleration due to gravity and s is the distance fallen then it comes out to be 4.429m/s...

5. Apr 25, 2010

### tiny-tim

Hi Alcape!
Yes, that's a possible answer …

but I suspect when the question says "turning speed", it means angular speed (for which you'd need to know the radius).

(and if that is the right answer, why is the question so complicated … why is it about a carousel? )

6. Apr 25, 2010

### Alcape

I don't know why it's so complicated I didn't make it