Escape velocity (1 Viewer)

[DementedDonkey]

Behind? Pah!

Pah! I've been on hol's all week, and in our last lesson we barely started relativity. My school's a bit like that, we haven't finished the modern core yet, or the prelim maths course! HA! Gotta love it.

 

[tabularasa]

There are more than one person in my class. we are up to motors an genreators now.

 

[TimeAndTide]

But if you use 'we', you are implying that your whole class could see my message. Think of it this way, some guy walks up to you, and you're alone. So he asks "Hey man, got a dollar?" and you say "No, we don't". It's that simple!

 

[tabularasa]

Are u denying my mulitple personalities.

 

[TimeAndTide]

Yes ma'am. Yes I am.

 

[(^o^)]

wow you guys taught me heaps about escape velocity for sure.
*sarcasm ends*

 

[TimeAndTide]

Whats sarcasm?
*sarcasm ends*

 

[tabularasa]

BAh the stuff on escape velocity was only needed for one question the rest was a prac. nothign needed,

 

[jang]

is this too late?

well, escape velocity is the minimum initial velocity to escape the earth's gravitational field.
its only a theoretical number since nothing can really be shot out of a canon into space (due to technology - and also humans cannot resist the g-forces)
... therefore we use rockets to provide a constant force and thus less g-forces on the astronaut