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### Topic: Accelerometer vs gyros (Read 3042 times)previous topic - next topic

#### GrooveFlotilla

#15
##### Oct 24, 2012, 12:54 pm
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Then what's keeping the earth from falling into the sun?

A big stack of turtles.

Not really good for anything, but they bring a smile to your face when pushed down the stairs.

#### fungus

#16
##### Oct 24, 2012, 01:01 pm

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if an object is rotating at a constant angular velocity then there is no force being applied to it.

Then what's keeping the earth from falling into the sun?

I'm not sure you know what rotation is.

According to you, these are completely unnecessary: http://www.ebay.com/sch/i.html?_nkw=mpu6050

Yet they exist... how do you explain that?
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

#### dhenry

#17
##### Oct 24, 2012, 01:15 pm
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According to you, these are completely unnecessary

You are mistaken.

#### fungus

#18
##### Oct 24, 2012, 02:28 pm

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According to you, these are completely unnecessary

You are mistaken.

...says the person who doesn't understand Newton's First Law Of Motion.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

#19
##### Oct 24, 2012, 03:07 pm

Q1: You are going east at 1km/h, and then  you go west at 1km/h. Is there a change in velocity?

Yes.  The object has to stop to go in the opposite direction.

Dhenry, you are making yourself look worse and worse with every post you make.  If you have any dignity left, before your next post, do some research on the subject.

#### GrooveFlotilla

#20
##### Oct 24, 2012, 03:21 pm
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Q1: You are going east at 1km/h, and then  you go west at 1km/h. Is there a change in velocity?
Is this one of those "what colour was the bear?" type questions?
Of course there is a change of velocity, because velocity is a vector quantity, so specifies a rate of displacement and direction.

Not really good for anything, but they bring a smile to your face when pushed down the stairs.

#### dhenry

#21
##### Oct 24, 2012, 06:57 pm
To save you some time, the radial acceleration for an object orbiting at speed v and radius r is v^2 / r.

I guess this thread shows why we need better teachers.

#### fungus

#22
##### Oct 24, 2012, 07:20 pm

To save you some time, the radial acceleration for an object orbiting at speed v and radius r is v^2 / r.

I guess this thread shows why we need better teachers.

What does that have to do with measuring yaw using an accelerometer?

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

#23
##### Oct 25, 2012, 03:43 am

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Then what's keeping the earth from falling into the sun?

A big stack of turtles.

I thought it was one big turtle and four elephants?