#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.

#3

No. There is an elephant in the way.

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

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

*Last edited by DashBlaster at Sep 7, 2009,*

#4

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

It concerns mechanics, which is maths.It has to do with velocity and displacement, so it concerns physics

Also, what directions are the cars moving in?

#6

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.

#7

168.58333333333333333 km's after the start point

#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

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

#9

over the cliff

#10

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.

#11

its an easy question.look at your notes and figure it out yourself rather than just being lazy

#12

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.

your meant to ask your science/physics teacher.

#14

Trust The Pit on mathematic problems

#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

if so then

105*(17/60) - 85*(17/60) = answer

#16

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.

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.

#18

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

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

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...

#21

How can one car be 17 minutes ahead of the other if they both started at the same time?

#22

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

#23

How can one car be 17 minutes ahead of the other if they both started at the same time?

Are you serious?

#24

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

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

#26

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

#27

85*17 = 105*t-85*t

85*17/(105-85)=t=72.25 minutes.

85*17/(105-85)=t=72.25 minutes.

#28

Never, you need to hit 88mph to time travel, and neither car does so.