Recent content by Unicow

Homework Statement Homework Equations Equation given in question. The Attempt at a Solution The only thing I could think of was to try changing the y=3x^3 into polar coordinates but I didn't know where to go from there... Could I get some direction to how I should go about this, I'm sort of...

I made a small mistake with the equation. I got the answer now, thank you so much. I didn't know I could do it that simply...

I get for the numerator

Wow, I can't believe I forgot to check that. The current answer on the picture shown is the final answer I had gotten, before that I think I made some mistakes. Edit: I just realized what you asked me to do. r(t) = <pi/3 - sqrt(3)/2, 1/2> r'(t) = <1/2, sqrt(3)/2> r"(t) = <sqrt(3)/2 , 1/2> v(t)...

Homework Statement Homework Equations The equation has already been given in the question. The Attempt at a Solution So what I did was find r'(t), r"(t), v(t), v'(t) and plug it into the equation. I've done 3 different full pages of this and have gotten 3 different answers. I'm guessing due...

You are an absolute life saver haha. Such a simple solution, I really need to learn to think outside the box... .

Homework Statement [/B] Find the radius and center of sphere ρ = 28 cos ϕ. Homework Equations Relevant equations would be the spherical and rectangular coordinate equations. The Attempt at a Solution I started off by multiplying both sides of the equation by ρ to get ρ^2 = 28 ρ cosϕ Then...

Ahh I see and understand now haha. Thank you for your help and it completely went over my head about how it could be more than one value of "n * pi / 3" for theta to be the value. I got the correct answer! Thank you so so much.

There's no way that can be right... I've already done a few questions and gotten them all right except for this one... Also, I might trust the textbook more than wikipedia. I hope you don't take this as an insult or anything because I do appreciate the help.

Yeah it's really frustrating especially considering it's such an easy question. I've tried decimal already and the simple "pi" or whatever, is correct for all the other choices...

Sorry I must have deleted the negative sign by accident while I was editing. I've edited it back in and I had counted that into my calculations and that's why my theta is negative pi / 3 instead of positive.

Homework Statement Convert from rectangular to spherical coordinates. (-(sqrt3)/2 , 3/2 , 1) Homework Equations We know the given equations are ρ = sqrt(x^2 + y^2 + z^2) tan theta = y/x cos φ = z / ρ The Attempt at a Solution My answer was (2, -pi/3, pi/3) It should be a simple plug and go...

Yeah, I ended up figuring that out sooner or later haha. Stupid mistake leading to almost an hour of checking over my work mostly. The answer was so simple. Thank you though haha. I tried to incorporate what we used in class but failed to recognize that we used kg in class vs lb.

Homework Statement https://ibb.co/g6iKDQ Calculate the magnitude of the force on cables 1 and 2 in the figure below if θ_1 = 55° and θ_2 = 35°. (Round your answers to two decimal places.) Homework Equations Is my method incorrect or did I go wrong somewhere in my calculations?? The...