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### Messages - spaceman spiff

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21
##### Flat Earth Community / Re: Newton's Laws of Motion
« on: May 25, 2014, 09:55:26 PM »
Exactly what we've been trying to tell you from the beginning is that the ISS could not have any angular velocity without a force causing it to accelerate in the direction of the Earth's surface.  Angular velocity is a quantity that describes how much its velocity vector changes over time.
I am not disputing that there is a component of acceleration. I'm saying the ISS itself is not accelerating. The forces balance.
Which forces? Gravity and...? Also, if there's a non-zero component of the acceleration (as you may have implied by "there is a component of acceleration"), it means that the ISS is accelerating.

22
##### Flat Earth Community / Re: Newton's Laws of Motion
« on: May 25, 2014, 07:21:08 PM »
http://en.wikipedia.org/wiki/Angular_acceleration
Quote
Angular acceleration is the rate of change of angular velocity.
This is what I have been trying to say. If angular velocity remains the same (as in a stable orbit), then there is no rate of change hence no acceleration.

This seems like a very easy topic for you to grasp.
Nice job cherry picking garygreen's post. You can say that there's no angular acceleration, but not that there's no acceleration. From garygreen's post:
Quote
Acceleration, in physics, is the rate at which the velocity of an object changes over time.
Quote
Velocity is the rate of change of the position of an object, equivalent to a specification of its speed and direction of motion, e.g. 60 km/h to the north[...]Velocity is a vector physical quantity; both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is called "speed"[...]
Since the velocity vector of the ISS changes direction, it is therefore accelerating
I am saying that the ISS is not accelerating.

I am sat in my chair. Under RET that means I have a force of acceleration towards the ground at 9.81 m/s^2.
But I'M NOT ACCELERATING ANYWHERE. At t=0 I am sat in my chair and at t=5 minutes I'm still in the exact same spot. There has been no rate of change at all.  Having a force of acceleration applied to me doesn't mean I am accelerating. The forces are cancelled. I'm stationary. The ISS has its forces cancelled. It travels with a constant angular velocity. Its not accelerating anywhere.

I got bored of this the last time. I'm getting bored again. Feel free to say how I was completely wrong about everything again next time you want to try to discredit me. Somehow my running out of patience over simple concepts is deemed as my not understanding something. But to me it just proves what a bunch of disingenuous little trolls you are.
I didn't even mention forces in my post, but whatever. Just to make sure we are in the same page, please define acceleration. I feel like we are not agreeing on the basics.
As a side note, what other force is acting on the ISS besides gravity?

23
##### Flat Earth Community / Re: Newton's Laws of Motion
« on: May 25, 2014, 06:54:03 PM »
http://en.wikipedia.org/wiki/Angular_acceleration
Quote
Angular acceleration is the rate of change of angular velocity.
This is what I have been trying to say. If angular velocity remains the same (as in a stable orbit), then there is no rate of change hence no acceleration.

This seems like a very easy topic for you to grasp.
Nice job cherry picking garygreen's post. You can say that there's no angular acceleration, but not that there's no acceleration. From garygreen's post:
Quote
Acceleration, in physics, is the rate at which the velocity of an object changes over time.
Quote
Velocity is the rate of change of the position of an object, equivalent to a specification of its speed and direction of motion, e.g. 60 km/h to the north[...]Velocity is a vector physical quantity; both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is called "speed"[...]
Since the velocity vector of the ISS changes direction, it is therefore accelerating

24
##### Flat Earth Community / Re: Newton's Laws of Motion
« on: May 25, 2014, 06:16:13 PM »
Wait, so an obect in circular motion with constant angular speed is not accelerating? Is this what Thork is saying? Wow...

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