Why are sin and cos reversed on an inclined plane? - Gravity components, inclined planes explained

This physics video provides an introduction to inclined planes and the reason why sin and cos conventions are reversed for the components of gravity on an inclined plane. This may apply to other forces acting on an inclined plane as well.

#education #physics #math #tutorial

[mirzy]

i swear down first 30 seconds you acc cleared my doubts, everyone's waffling on youtube making 20 mins videos on this 😭😭

[Benolson]

You completley outclassed my physic professor thank you!

[Amy._L]

This is the only sin-and-cos video I found useful among other teaching videos, about inclined plane in physics ❤❤❤

[campnasx]

Marvelous. I could not find any video covering this information in my mother tongue portuguese-BR, thank you for helping me.

[ahaadhussein]

please keep going, your explanation skills are one of a kind, and I know your channel will blow up with time!

[crazeladd]

Brilliant; thank you for the clear and concise information <3

[chenqing]

I love the illustrations. It really helps with my understanding and frankly looks better than khan academy

[dany_x]

Thank you so much I have an exam tommorow and I was so confused 😅

[vaniagomes]

Thank you so much! This really helped.

[Attalla-tb]

2:10 Why is that angle in the "new triangle" theta? Why shouldn't it be 90 - theta?

is it because the angle looks like a perfect angle (90 degrees), and then because half of that angle is 90- theta, therefore the remaining angle must be theta? Okay, but then what about the other magnitude of the other angle in that "new triangle"?

[Attalla-tb]

2:09 Why does that angle have to be theta? Why shouldn't it be 90 - theta?

[Orius]

Adding the new triangle, a new theta, and SOH CAH only made this topic way more confusing. All you really needed to do was show a standard 3-4-5 triangle with typical sin/cos for y/x, and then show how the opposite and adjacent angles switch on an incline plane relative to the location of theta and how gravity gets split into two vectors (parallel and perpendicular to the incline plane). The calculations and adding up degrees were unnecessary. Good try though!