Quick Question, Area under speed-time graph is the distance travelled??

T or F?

Question

Quick Question, Area under speed-time graph is the distance travelled??

T or F?

anonymous · Answer

t

dumbcow · Answer

True

speed = distance/time *time = distance

anonymous · Answer

umm 

is this a physics question?

saifoo.khan · Answer

No, this is Math,

anonymous · Answer

okies :)

saifoo.khan · Answer

Now it's fine. 
:D

anonymous · Answer

Distance to me is an absolute value. No directional sense. So, as I pointed in the link and as MrYantho suggested, I like displacement.

saifoo.khan · Answer

Okay!! (:
can u solve the question in the picture?

anonymous · Answer

Saifoo - sorry man....I did this stuff 22 years ago and it is hard to remember. I can google it up and get it. But, you or someone current is going to be a lot better at it.

saifoo.khan · Answer

No worries. Thanks for trying! :)

anonymous · Answer

sorries me cant do it either

:(

saifoo.khan · Answer

np

anonymous · Answer

um its just at 
constant speed 
not instantaneous right?

saifoo.khan · Answer

first it has increasing speed, then constant speed,
i want to draw the distance-time graph for this.

anonymous · Answer

could you wait a bit 
ill try to help
this stuff is in my physics book

anonymous · Answer

its the math it uses

saifoo.khan · Answer

This might help,

anonymous · Answer

the formula  you just use is a regular d=r/t

saifoo.khan · Answer

idk. this is the screenshot form the marking scheme.. i have no idea how they did that.

anonymous · Answer

formula for aceleration



final speed= initial speed + speed change

saifoo.khan · Answer

$$a = \frac{v-u}{t}$$Right?

saifoo.khan · Answer

But how we will draw the speed-time? :l

anonymous · Answer

on you graph


y is the speed
x is the time

saifoo.khan · Answer

wait. sorry..
that is already drawn in the question.. i want displacement time. hehe,

anonymous · Answer

displacement ?

umm i dont understand 

displacement from what?

saifoo.khan · Answer

read the question again, that might help you the part (i) http://assets.openstudy.com/updates/attachments/4f1a4dd4e4b04992dd22a68d-saifoo.khan-1327124195861-dscn4553.jpg

anonymous · Answer

it is cut off

anonymous · Answer

can you type the rest it?

saifoo.khan · Answer

The first part says to sketch the region whose area represents and stuff.. t

And the cut off part says "find the value of T"

anonymous · Answer

first time change of 1 cyclist

s=(v)  (t) + 1/2 ( a)( t) 

use formula again to find displacement again of the cyclist

anonymous · Answer

then you may probably use 

d=rt 

to figure out the rest of the stuff

i think this is how it is done


:\

anonymous · Answer

it's true that the area under speed-time graph is distance
you can get this from this formula d=vt
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