[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 229 KB, 752x999, redon.crying-spider.jpg [View same] [iqdb] [saucenao] [google]
5073962 No.5073962 [Reply] [Original]

Is there a proof for the equation for the normal force on an inclined plan N = mg•cos(ø)? I understand why N = mg on a level plane, but I don't understand where the cos(ø) comes in.

>> No.5074001
File: 8 KB, 391x300, Friction.png [View same] [iqdb] [saucenao] [google]
5074001

>>5073962

>> No.5074015

>>5074001 doesn't answer my question

>> No.5074032

g

>> No.5074028
File: 299 KB, 490x392, 1302910503056.gif [View same] [iqdb] [saucenao] [google]
5074028

>>5073962
Is trig not a requirement for physics at your educational institution? Or are you just teaching yourself?

You just need to understand trigonometry in order to answer your question. I'd draw you a picture but this is the internet.

Right triangles man, triangles...

>> No.5074036

>>5074015
Then there's nothing I can do for you.

>> No.5074049

>>5074015

but it does

>> No.5074058

>>5073962
You should really know at least basic trigonometry when doing physics to do this.

http://www.youtube.com/watch?v=TC23wD34C7k Watch this video maybe it can help.

>> No.5074089

>>5074058
Thank you for actually giving me a legitimate response.

>> No.5074123

>>5073962
OP you are seriously learning impaired if the first response doesn't clear it up for you.

I would recommend expressing the force of gravity as mg and then seeing what you can do with the triangle to make it come out all nice and pretty.

Hint: use cosine and sine