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

100km/90min = 1.10km/min
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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.
Km/H
-100Km / 1.5 (Hour and a half)

Km/minute
-100Km/90 (minutes)
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,
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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im not a good teacher lol

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1 m\s^2 ??

4 m\s in 4 seconds?
dude school is where you learn. You don't learn velocity and stuff on the Pit .
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This **** is ****-easy! You shouldn't have to pay much attention to get this
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
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
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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