Comparing Car A and B's Velocity on London to Birmingham and Nottingham Routes

[roza-chan]

1. Homework Statement
car A goes from london to birmingham with 25m/s vilocity,car B goes from london to nottingham with 25m/s

Homework Equations

velocity=displacement/time



3. The Attempt at a Solution
are those two car's velocity equal?explain it

 

[Doc Al]

Well, what do you think? Hint: What's the key difference between velocity and speed?

 

[roza-chan]

velocity has directions but speed doesn't have one...does this get to something?

 

[Doc Al]

velocity has directions but speed doesn't have one...does this get to something?

Exactly. So ask yourself: Are the directions the same?

 

[roza-chan]

yeah they are both to north...so they are equal right?

 

[Doc Al]

yeah they are both to north...so they are equal right?

I have no idea where Birmingham and Nottingham are, but if they are both exactly north of London then their displacements from London will have the same direction.

 

[roza-chan]

ya they are both in north of london,so if they are both going with 25m/s and both to north (same direction)so that means they are equal right?

 

[Doc Al]

OK, I'm now looking at a map of the UK. I would say that neither city is directly North of London, and if I draw a displacement vector from London to each city, those vectors don't look parallel to me!

 

[roza-chan]

umm well you one of them is more north and the other is a bit to east...and which mean they're not exactly the same direction..so it means they are not equal after all?

 

[Doc Al]

umm well you one of them is more north and the other is a bit to east...and which mean they're not exactly the same direction..so it means they are not equal after all?

That's what I would say. (More important than any particular answer is knowing the reasoning behind it.)

 

[roza-chan]

thanx a lot for the help~~