week 4 activity 4 question 1)

[sareena sanil]

here in question 1 

do we have to use -b/2a

for equation   -5t^2+0.5ut=0 

and that how we get 20 ??

ie  -0.5u/-10=1/20u

u=20m/s

is this correct?

[Jaya Krishna Vamsi Krishnamsetti]

[SUHANA PARVEEN S]

@ Jaya krishna vamsi krishnamsetti

this eqn y=(b^2/4a)+c, would we can use  always when solving y in these kinds of questions...Where did u get this eqn from..??

regards

suhana

[Jaya Krishna Vamsi Krishnamsetti]

Hey this is general formula to find y like -b/2a for x.

The proof for y is in 4 th page of this pdf.But I request you don't go directly to fourth page and try to understand. Please read from 1st page.

[SUHANA PARVEEN S]

Ok..I will do it.....Thank u ...

[Rahul POD]

Thank you Jaya.

[sareena sanil]

Thank you so much for your help

[varada vnm]

Thanks alot for this explanation.

Regards 

Varada