# Naked Science Forum

## General Discussion & Feedback => Just Chat! => Topic started by: stormwarning on 28/09/2007 08:46:14

Title: 1034mph and going nowhere fast
Post by: stormwarning on 28/09/2007 08:46:14
Hypothetical Q...
If  I could run at 1034mph (approx speed of Earths spin)and I was at the Equator and running in the same direction as Earths spin... Would I be running on the spot   [;D] [???] [;D]
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 11:43:32
You mean running in place in the same spot!

You would still be moving forward,I think, but just as fast as the earth you would be able to run from point "A" all the way around the world and back to point "A" in the time it takes for that single rotation, I would imagine!..That too is an uneducated guess.. would someone like to take a shot at this and correct me as I believe I may be wrong in my logical thinking here!
Title: 1034mph and going nowhere fast
Post by: Simulated on 28/09/2007 12:02:44
Hypothetical Q...
If  I could run at 1034mph (approx speed of Earths spin)and I was at the Equator and running in the same direction as Earths spin... Would I be running on the spot   [;D] [???] [;D]

HAHA whata question! I'm goign to print that off and ask my science teacher haha
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 12:05:25
LOL! GO for it!
Title: 1034mph and going nowhere fast
Post by: Simulated on 28/09/2007 12:06:56
I don't see how you could, but ath's funnier then snit. Lol
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 12:09:02
You don't see how you could what run around the world if you were traveling at the same speed as the earth, putting one foot in front of the other only faster???
Title: 1034mph and going nowhere fast
Post by: Simulated on 28/09/2007 12:10:35
This is a confusing question.
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 12:14:13
Yes ANd I am a child and don't understand. One would not be outside of the world running one would be still under the laws of gravity right! so feet would still be making contact with tyhe ground but at an incredible speed one foot after the other.. so wouldn't you think there would still be forward motion only equal to the speed of the revolution of the earth???
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 12:18:01
We need to make a model and try it.. Wait... would a tread mill be similar as then you would

be running in place, UNLESS you SURPASSED the speed of the rotation of the belt!!!! Hey.... I

think you might be in the same place as the treadmill has a belt that rotates and in order

to keep up with the belts rotation one must equal out the speed at which the belt is moving

in order to continue to run.
Title: 1034mph and going nowhere fast
Post by: Simulated on 28/09/2007 12:21:48
yeah i have to go byebye
Title: 1034mph and going nowhere fast
Post by: Karen W. on 28/09/2007 12:23:08
OH..Bye!
Title: 1034mph and going nowhere fast
Post by: DoctorBeaver on 28/09/2007 19:55:53
Think of it this way... if you were on top of a bus that was travelling at 20mph and you were running in the same direction of the bus at 20mph then your speed relative to the ground would be 40mph and you would run off the front of the bus.

So, if you were running at 1034mph at the equator in the same direction as the rotation of the Earth then your speed would be 2068mph.
Title: 1034mph and going nowhere fast
Post by: Simulated on 28/09/2007 22:46:50
Yeah I forgot to print it off. And i'm going to for monday.
Title: 1034mph and going nowhere fast
Post by: Karen W. on 29/09/2007 02:34:30
I still don't get it!
Title: 1034mph and going nowhere fast
Post by: Simulated on 29/09/2007 02:35:00
haha same with me. Don't feel bad your not alone on this one.
Title: 1034mph and going nowhere fast
Post by: Karen W. on 29/09/2007 02:36:30
LOL! YAYYYYYYY! I'd like to run that fast!

Why does our speed double?
Title: 1034mph and going nowhere fast
Post by: Simulated on 29/09/2007 02:40:55
Yeah Doc..You have to help us little underacheviers out a little bit.
Title: 1034mph and going nowhere fast
Post by: Karen W. on 29/09/2007 02:42:37
Dud I really don't get it! LOL! I hate math!
Title: 1034mph and going nowhere fast
Post by: DoctorBeaver on 29/09/2007 07:54:42
OK.

Speeds are added together, or not, depending on what you are measuring the speed against.

Imagine yourself on a train. The train is heading forwards at 50mph. You walk through 1 of the carriages at 5mph in the same direction the train is travelling. Relative to the motion of the train, you are travelling at 5mph. But relative to the ground outside the train you are moving at 50+5=55mph.

Then imagine you roll a ball forwards as you are walking. You roll it at, say, 10mph. The ball's speed relative to the ground outside the train would be 50+5+10=65mph. Relative to the train it would be 5+10=15mph, and relative to you it would be 10mph.

The same principle applies to those mad lumberjacks who do log rolling. As the log rolls, they try to move in the opposite direction at the same speed. You therefore get x+(-x)=0mph, so the lumberjack should remain stationary.
Title: 1034mph and going nowhere fast
Post by: Simulated on 29/09/2007 13:18:57
I see thanks Doc
Title: 1034mph and going nowhere fast
Post by: Karen W. on 29/09/2007 17:50:51
Thanks Doc that helped some. My grandfather was a Lumber jack I have a picture of him somewhere standing on the logs in the middle of a log pond!