#1
Anyone good with velocity? Cos i need some help.

so V = D/T

A car is traveled 100 km in 90 minutes, what is its average speed?

So i would have to convert the km to metres and minutes to seconds which ends up as 100000/5400 which equals 18.51 m/s, right? How do i work out km per minute and kilometres per hour?


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#2
Lol @ Angelo.

90 minutes = 1.5 hours
100km/1.5h = 66.67km/h

100km/90min = 1.10km/min
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#3
Km per minute? Divide the number of kilometers by the number of minutes.

Km per hour? Divide the number of kilometers by the number of hours.
#5
Thanks Ray. I really hate this stuff.


While im here,
A tram increases speed from 7 m/s to 11 m/s in 4 seconds. What is its acceleration?

Man i have not done this stuff in class...


The truth hurts, but denial is what kills you.



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Last edited by нαиd of вlood at May 13, 2008,
#6
km per minute:

divide both sides by 90

therefore, 90/90 = 1(minute)
100/90 = you can do it lol


km per hour
then once you find how many kms per minute,
you can times both sides 60

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#7
im not a good teacher lol

[quote="'[x"]Huffy[x]']Just give up, because Callo just destroyed you.
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#9
dude school is where you learn. You don't learn velocity and stuff on the Pit .
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#10
This **** is ****-easy! You shouldn't have to pay much attention to get this
#11
put time into hours so 90 min is 1.5 hours divide distance travelled by the hours
that equals an average of 66.66 recurring km/h
divide speed by 60 to get km/m =1.111km/m
divide by 60 twice for m/s 18.56m/s
#12
Quote by нαиd of вlood
Thanks Ray. I really hate this stuff.


While im here,
A tram increases speed from 7 m/s to 11 m/s in 4 seconds. What is its acceleration?

Man i have not done this stuff in class...

its acceleration is one metre per second
#13
Quote by нαиd of вlood
Thanks Ray. I really hate this stuff.


While im here,
A tram increases speed from 7 m/s to 11 m/s in 4 seconds. What is its acceleration?

Man i have not done this stuff in class...

Acceleration = (final velocity - initial velocity)/time
= 4ms^-1 / 4s
= 1ms^-2 or 1 m/s^2
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