Question 7b)iv.........did anyone find the area under the curve to find the distance? (1 Viewer)

[dnt stop runnin]

did anyone attempt to foind the area under the curve for that question since it was a velocity vs time graph??.........let me know wat u all did

 

[psycho_mushy]

nah that question was fucking impossible....

I did some practice questions on it before... still coudln't get it.....

 

[dnt stop runnin]

i think we had to do integration for the area under the curve between 0 and (pie) as a definiite integral......but i got a decimal or sumfing??.....i wonder wat the actual answer was

 

[haz_it_all]

u had to integrate to find x......then find the distance from 0 - pi/2 and from pi/2 - pi cuz the velocity changed from +ve to -ve after pi/2 so it was going back towards origin........i think did anyone else get that

 

[cakes]

i got something like 2pi, or pi/2, cant remember but i think im wrooong

 

[dnt stop runnin]

yeh i was gonna do that as well, as in seperate them......but i got lost thinking its a velocity vs time graph so it shouldnt matter unless it was a displacement time graph...........i never ended up getting any negative answers..........then again, i dnt know if my logic ir right or wrong..............anyone got a definite answer????

 

[haz_it_all]

i rememba i got sumthin like ( root 3 - 3) m or sumthin

 

[haz_it_all]

i rememba i got sumthin like ( root 3 - 3) m or sumthin....cant remember, there mightve been a pi in there sumwere aswell

 

[Winston]

Originally posted by haz_it_all
u had to integrate to find x......then find the distance from 0 - pi/2 and from pi/2 - pi cuz the velocity changed from +ve to -ve after pi/2 so it was going back towards origin........i think did anyone else get that

i did it from

0 - Pi/3 + absolutle Pi/3 - Pi

 

[haz_it_all]

why pi/3? wasnt that were it cut the x-axis???? or sumthin?

 

[vennyra]

I separated it into the area under the x-axis [absolute value] and the area above it. Of course i decided to be an idiot, not read the question and find the distance travelled between 0 and 2pi, which took AGES - well, there goes 3 marks and 15 mins of my exam time

 

[SmokedSalmon]

I found the area under the curve. Below and above the x axis and added them together. If you do physics then you would have known that... luckily I do

 

[qotsaoperations]

dag, i totally forgot about the area under the curve....i did everything but that, fuck!

 

[d__o__a]

yeh sure did

 

[Winston]

Originally posted by haz_it_all
why pi/3? wasnt that were it cut the x-axis???? or sumthin?

yeah that's why i stuffed it up lol!