- #1

BlueBiro

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Hi, nice forum. I was thinking how I would go about proving with an example, that negative Gs are occurring?

Say a stunt pilot is doing a maneuver that will expose him to negative Gs. It could look like this:

[URL]http://upload.wikimedia.org/wikipedia/commons/5/57/Aeros_fig_englishbunt.svg[/URL]

Let his mass = 70kg and v = 60 m/s

These can be modified if you like

Fc = (mv²)/r & F = ma

or ac = v²/r ?

I was hoping to be able to finish with something like: if r > 1024m then he experiences -Gs but the answer is always positive. The only thing that could be -ive is velocity but it's squared. Am I attacking this wrong?

## Homework Statement

Say a stunt pilot is doing a maneuver that will expose him to negative Gs. It could look like this:

[URL]http://upload.wikimedia.org/wikipedia/commons/5/57/Aeros_fig_englishbunt.svg[/URL]

Let his mass = 70kg and v = 60 m/s

These can be modified if you like

## Homework Equations

Fc = (mv²)/r & F = ma

or ac = v²/r ?

## The Attempt at a Solution

I was hoping to be able to finish with something like: if r > 1024m then he experiences -Gs but the answer is always positive. The only thing that could be -ive is velocity but it's squared. Am I attacking this wrong?

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