#1
If one car is going 85 km per hour and another is going 105 km per hour, at what point will the faster car be 17 minutes ahead of the other
#2
That's not really Physics, it sounds more at home in a Math class. And I hate those questions.
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#3
No. There is an elephant in the way.


EDIT: To start with, convert the 85km/h and 105km/h to metres/minute.
Last edited by DashBlaster at Sep 7, 2009,
#4
Quote by itchy guitar
That's not really Physics, it sounds more at home in a Math class. And I hate those questions.


It has to do with velocity and displacement, so it concerns physics
#5
Quote by tubatom868686
It has to do with velocity and displacement, so it concerns physics
It concerns mechanics, which is maths.

Also, what directions are the cars moving in?



stratkat
#6
Quote by tubatom868686
It has to do with velocity and displacement, so it concerns physics


Everything on this planet is related to physics....and everything in physics relates to/can be explained mathematically.....so you're both right!


But yeah....I can't help you. sorry.
#8
As if you can't figure this out T.T

I can see, it's easy... My brain just doesn't want to do it for you
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#10
Quote by tubatom868686
If one car is going 85 km per hour and another is going 105 km per hour, at what point will the faster car be 17 minutes ahead of the other


Well, assuming they start at the same time,

car1 is going 85/60 = 1.41666 km/min.

At the point you're solving for, the cars would be 1.416666 km/min = x km/17 min

x = 24.08333 km apart.

car2 is going 20km/hr faster than car1, or .3333km/min. How long will it take before they are 24.083333 km apart?

.33333km/min * y min = 24.083333 km

y=72.25 min.


I think.
Quote by mort1
know im in the wrong forum
im not stupid........... duh
if you havent notised there is alot of ignorant people here,,,,,,,
#11
its an easy question.look at your notes and figure it out yourself rather than just being lazy
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#12
Quote by DashBlaster
No. There is an elephant in the way.


EDIT: To start with, convert the 85km/h and 105km/h to metres/seconds.

Fixed.

edit: and, TS, just calculate the relative speed and multiply it by 17*60
#13
when you cant do your homework...your not meant to ask UG...

your meant to ask your science/physics teacher.

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#15
i take it u mean after 17 minutes how far away is the second car from the first.
if so then
105*(17/60) - 85*(17/60) = answer
There is more than one thing i have to say...
#16
Quote by Demonology
As if you can't figure this out T.T

I can see, it's easy... My brain just doesn't want to do it for you


Im not looking for an answer, but an explanation
#17
X=VT
X=displacement (the distance)
V=velocity, after converting
and T=Time
*Random letters will be used*

So, (i think) V1*17 = Y
then V2*17 = Z

Z-Y = W
then W*17 = X

I think.
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This post may contain my opinion and/or inaccurate information.

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#18
Quote by ordino
i take it u mean after 17 minutes how far away is the second car from the first.
if so then
105*(17/60) - 85*(17/60) = answer

That's not what hes asked to find out.
#19
Quote by ordino
i take it u mean after 17 minutes how far away is the second car from the first.
if so then
105*(17/60) - 85*(17/60) = answer


The question is basically saying that theres a point that both cars are meeting at, and they are traveling an equal distance to get there. They want to know how far from the origin that place would have to be for the faster car to get there 17 minutes earlier
#20
Quote by tubatom868686
If one car is going 85 km per hour and another is going 105 km per hour, at what point will the faster car be 17 minutes ahead of the other



72.25 min.

I'm pretty sure it's 126.44 km about. lets see.

Car 1 would get there in 126.44/85 = 1.48 hours
car 2 would get there in 126.44/105 = 1.204 hours

Eh, my answer works out to about 16.56 minutes, but it's probably because I didn't carry enough decimal places...
Quote by mort1
know im in the wrong forum
im not stupid........... duh
if you havent notised there is alot of ignorant people here,,,,,,,
#21
How can one car be 17 minutes ahead of the other if they both started at the same time?
I think it's time for a change.



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#22
Quote by tubatom868686
The question is basically saying that theres a point that both cars are meeting at, and they are traveling an equal distance to get there. They want to know how far from the origin that place would have to be for the faster car to get there 17 minutes earlier



ohh sorry, in that case something to do with finding how far the first car travells in 17 mins and and finding out how much time it take for the second car to get to its destination.
yeah sorry its late here and thats a hard question, i probably have no idea what im saying
There is more than one thing i have to say...
#23
Quote by §ArmyofAngels§
How can one car be 17 minutes ahead of the other if they both started at the same time?

Are you serious?
#24
Quote by EuBoat
It concerns mechanics, which is maths.

Also, what directions are the cars moving in?



Lol it's not to do with the cars mechanics, it's to do with speed measurement, which is a part of physics.
#25
Quote by §ArmyofAngels§
How can one car be 17 minutes ahead of the other if they both started at the same time?


I think mebbe wun of dem has rocketz lulz
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#26
Quote by §ArmyofAngels§
How can one car be 17 minutes ahead of the other if they both started at the same time?


idiot, they're at different speeds
Brasil.

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