Questions you've always wanted to asked...

When flying from the UK to Australia, assuming it is the same distance clockwise or anti-clockwise and no other affecting factors such as wind, which distance is it quicker to fly considering the spinning of the earth?
 
dmpoole said:
I reckon if you stood at either pole then the earth would revolve underneath you but it would be very slow (one revolution in 24 hours)
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Good point. I don't know much about rotational velocity (wasn't covered in my A-level syllabus) but I think you might be right.
 
Gaverick said:
When flying from the UK to Australia, assuming it is the same distance clockwise or anti-clockwise and no other affecting factors such as wind, which distance is it quicker to fly considering the spinning of the earth?
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No difference.

I believe the earth's rotation makes a big difference when launching things into space, but I think that if you're not leaving the atmosphere it doesn't matter.
 
iCraig said:
An undetermined amount of time. As long as both parties are aroused, and or have sufficient lubrication, hours and hours I guess.

Physical exhaustion would end it though. The body would have to stop and rest at some point, so I guess it depends on the physical stamina of the man and even the woman.
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I need figures man....this is for the good of science and all virgins out there. So what do you reckon, a day or two? :eek: :D
 
Even at 1 rotation per 24 hours it'd cover a relatively big distance in a second from a persons point of view (think about the circumference of the earth :eek: ). If you jumped and the earth did rotate under you, I would expect you to land a good 100 metres away! Obviously, that doesn't happen; I believe its because when you jump you have momentum and don't slow down significantly in the jumping time, so effectively track where the earth goes?
 
Dr.EM said:
Even at 1 rotation per 24 hours it'd cover a relatively big distance in a second from a persons point of view (think about the circumference of the earth :eek: ). If you jumped and the earth did rotate under you, I would expect you to land a good 100 metres away! Obviously, that doesn't happen; I believe its because when you jump you have momentum and don't slow down significantly in the jumping time, so effectively track where the earth goes?
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In theory, you wouldn't slow down at all since there's nothing to slow you down. Apart from that your answer makes perfect sense.
 
If you got every person in a plane to jump up and down at the same time would the plane start having the turbulant effect? :p
 
Dr.EM said:
Even at 1 rotation per 24 hours it'd cover a relatively big distance in a second from a persons point of view (think about the circumference of the earth :eek: ). If you jumped and the earth did rotate under you, I would expect you to land a good 100 metres away! Obviously, that doesn't happen; I believe its because when you jump you have momentum and don't slow down significantly in the jumping time, so effectively track where the earth goes?
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Actually the tangential velocity of the Earth's surface is about 465 m/s :)

However, it's not due to momentum that we don't move backwards along the surface of the Earth; we are a part of the Earth's frame of reference, and so we continue to move with the Earth even when we are no longer in contact with it. For the Earth to move forwards beneath us would require deceleration, which in turn would require a force to be applied to us, according to Newton's first law.

In reality, it's not quite as simple as this, as we are actually rotating, while Newton's mechanics only apply to linear motion. However, if we ignore everything outside our frame of reference, we can assume ourselves (and the Earth) to be stationary. In this case, it's easy to see that nothing should happen if we jump :)

Basically it's important to remember that quantities like velocity, momentum, etc. can only be measured relative to the observer's frame of reference. For example, if I'm on a train travelling at 30m/s, then to me, everything outside the train is travelling in the opposite direction at 30m/s, and I'm stationary. In order for any change in velocity to occur within this frame of reference, a force must be applied to it.
 
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Why do ladies say no when they mean yes especially during a fore play? Well some of them. Please keep it clean. Any lady wanna shed more light? :)
 
ElRazur said:
Why do ladies say no when they mean yes especially during a fore play? Well some of them. Please keep it clean. Any lady wanna shed more light? :)
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Because hitting F5 doesnt count as forplay :p
 
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