Projectile Question (1 Viewer)

[lyounamu]

http://www.boredofstudies.org/courses/maths/3u/1202628981_1990_Mathematics_Extension_1_Trial_Paper.pdf

Go to the page 4 and look at the question 3U96-7b)!

I don't know how to get part ii and iii

Thanks in advance.

EDIT: Don't worry I just got it.

 

[lyounamu]

http://www.boredofstudies.org/courses/maths/3u/1202628981_1990_Mathematics_Extension_1_Trial_Paper.pdf

Got another question.

Go to the page 5 and look at the question 3U95-7)!

I don't know how to get part ii, iii

Thanks in advance.

 

[conics2008]

i) find displacement of x and y and then make t subject and solve together and should end up with the required.
ii) sub x= ORcos@ and y=ORsin@ into i ( let OR =m )
iii) use this fact for max sin(alpha - @ ) =1 for max.

ps i havn't done this on paper. I remember doing this type of question from this hsc paper which escapes my mind. soo yeah i got the method from there.

good day and good luck


Hey layoy go to HSC paper 2000 and look for the projecticle question and the working out =]

 

[12o9]

 

[lyounamu]

I don't understand the beginning of your step III. I can see that you differentiated it but I cannot get what you got. And the answer is not right for part iii.

Thanks in advance.

 

[Aerath]

I don't understand the beginning of your step III. I can see that you differentiated it but I cannot get what you got. And the answer is not right for part iii.

Thanks in advance.

 

[12o9]

I don't understand the beginning of your step III. I can see that you differentiated it but I cannot get what you got. And the answer is not right for part iii.

Thanks in advance.

What Aerath said about the beginning of step 3 =).

Umm. the answer is right. Its just that they wanted it presented geometrically. So I rearranged it so it could =). I think..

 

[lyounamu]

What Aerath said about the beginning of step 3 =).

Umm. the answer is right. Its just that they wanted it presented geometrically. So I rearranged it so it could =). I think..

Ah...sorry. I was looking at the answer where it said alpha = @ + pi/2

Thanks!