So im trying to solve those basic questions preping for my finals...

>>8511635
What's there not to understand?

[math]\vec{F}_{R} = \vec{F}_{1} + \vec{F}_{2} = \begin{pmatrix}300\cos(30) - 500\cos(65)\\ -300\sin(30) - 500\sin(65)\end{pmatrix}[/math]

>>8511681
is that suppose to be a matrix ?

Decompose each vector into x and y components. Add components. Solve for the unknown.

Fucking engineers.

>>8511700
matrix notation if you want to call it that I guess. It's a vector so I don't have to write out [math]\hat{u}, \hat{v}[/math] with a super long expression.

>>8511710
that doesn't work i love your ego calling me a fucking engineer
the sin(x) cos(x) only work for 90 cases such as a x-y plane. in this case it doesn't and wont give you the same answer.

clear your fucking ego cunt and think before you give an answer.

>>8511718

You are a fool. Your retort doesn't even make grammatical sense.

Yes you can decompose it, silly engineering freshman.

>>8511744
ill try and tell you what i get .

>>8511718
>failing this hard in everything
You should drop any sort of intelectual activity.

>>8511748
not understanding or not being able to see a certain aspect doesn't mean a student has to drop what he is doing.

your the sort of person that quits as soon as he can't get the answer blaming it on genetics or some bullshit.

unless you are another troll, then haha you are very funny and edgy...

>>8511753
>Defending some retard who thinks /sci/ is his special place to solve homework because he is too autistic to create a stack exchange account.

>>8511746
>>8511744
>>8511714
>>8511710
>>8511681


Yes 2.1 works ...
you were right, Sorry.

Ill try number 2.2 and tell you if its possible using this same method. I was very confident that it was not possible since i had tried solving another similar problem but it wasn't possible.

>>8511681
>>8511710
>>8511714
>>8511744
>>8511748

try doing 2.2
thats when using cos and sin method wont work anymore .

>>8511767
Obviously you will not be able to solve anything if think there is a "cos and sin method" and you are incapable of anything besides plug and chug. Some people just assume you know what a dot product is and call the collection of methods analytical geometry.

>>8511792
ayyy thx senpai

>>8511798
wtf if you write "Fa m" it replaces it with senpai ?

File: 20161203_114905-1-1-1-1.jpg (4MB, 2101x1989px)

4MB, 2101x1989px

2-2 should be solvable with the same method.

>>8511825
i dont think so. since its asking for different things

>>8511870
You just need to find u / v component. Which is part of the solution in 2-1.

>>8511880
im not seeing how you use the sins thats what im not seeing --> the logic behind there use, im sure its something very basic and when someone tells me ill smack my head in my book. but i dont see how you use them.

why the fuck is
>250sin(30)=c=vsin(105)
>250sin(45)=c=usin(105)

>>8511887
>250sin(30)=vsin(105)
>250sin(45)=usin(105)

>>8511882
Look up Sine Rule and Cosine Rule.
It's more on geometry.

>>8511896
i did and i dont see the triangle they are using to create that connection

i understand using the cosine kaw for q 2.1 part 1 for Fr.

but cant see how they use sine law

>>8511903

Look at >>8511825 , Each forces are in a seperate triangle.

Look how it decomposed the force into uhat and vhat.

>>8511905
will do thx

10/10 bait. look at all the replies

>>8511652
Are you a grill ;)

>>8512179
no

>>8511635
Wow OP are you in elementary school

>>8512436
ok