You're not adding the mass of the car to anything. The car and truck are part of the same system, and the velocity of their centre of mass is constant, even after the collision.

Booooo.

Panda is against me!

Mine was the best.

:(

Um, You are adding the mass of the car to the mass of the bus.

 

The car is not part of the initial centre of mass, which is the bus. When the mass changes, the velocity will change according, because it takes more force to move a bigger object.

 

Want to know why?

 

It's called inertia. Look it up.

doonk!

Um, You are adding the mass of the car to the mass of the bus.

 

The car is not part of the initial centre of mass, which is the bus. When the mass changes, the velocity will change according, because it takes more force to move a bigger object.

 

Want to know why?

 

It's called inertia. Look it up.

 

why, when considering the centre of mass of the two part system, the car and the bus, do you ignore the mass of the car? The centre of mass is the point which acts as though all the mass of the system is concentrated at that point, yes? We're talking about the same thing here, are we?

 

And what do you mean, the mass changes? The mass of the system is constant. The mass of the bus + the mass of the car. Nothing changes.

 

Inertia doesn't have much to do with the velocity of the centre of mass, I don't think, at least in the context of this question.

You have to consider them separate. Because at the beginning of the thought experiment the car was not going the same velocity as the bus.

 

They are unentangled, therefore cannot be considered the same.

 

Once they are entangled upon collision however, it is impossible to not mention them relative to each other.

 

And eys, Inertia has a lot to do with the velocity of the centre of mass.

Mine was the best.

 

*claps*

I really do think that uhh.. Well.. The answer to everything either is "Who cares" or "It explodes". *nods* Even maths and who Mat spanked. And the Faction leader question.

 

Did anyone get that Faction leader one? :p Raeyn and Sebby left ages ago. I'm pretty sure only about... 7 or 8 people probably even remember.

I got it.

How did you get Raeyn? You weren't around for that. >.>;

Because I knew Raeyn was a BA member.

*considers* Fair enough. Simple search on the other boards is enough to find that out.

I didn't need to search, I just happened to know it for some reason :P

 

And i got the tail end of Raeyn :P

sounds hinky

I agree with Moir on problem 1.

 

         

I agree with Moir on problem 1.

 

         

 

 

bugrit.

 

OK, Eli 9, Moir 9. Eli did the tiebreaker, so Eli's still first, with Moir second.

 

I won't take points from bcx now since it's unfair and he's in the BA, so I'll give Moir 12 points next month.  ;D

Gumboots my ass.

;D

*gasps*

such bs.

you stick with your original answers.

(btw I don't really care just had to make a stand)

I did stick with my original answers.

 

His 'answers' were wrong.

Just know that next time you too can avoid points by stopping midway through.  I hope you all learned your lesson.

Eli, just go away and enjoy your winner's trophy.  :P

 

Moir, it was just one answer.

 

Pukah, you did very well. *nods*

what's a gumboot? >.>