Recent content by Bensky

No problem

Yeah, honestly, all the Physics professors EXCEPT for Chang are horrendously bad at VT. Enjoy 2306 next semester...it's a fun time.

Haha nice, you're a VT student too? I had Chang a couple semesters ago...I thought he stopped teaching?

I just subtracted the two equations. That's why the 2.4 is positive on the lefthand side and the v0 disappears. Also, this thread is OLD and has been solved already. Someone can close it as I said in the previous post

I'm still not quite understanding - isn't it possible that he doesn't know all 5 of them and is simply in the same room with random people? Do you mean "AT LEAST 3 he either knows or 3 he doesn't know?"

Homework Statement As a background to this...I have no experience with proofs at all. I did not take a formal geometry class in high school (took a shortened summer course that gave a VERY brief overview of proofs) and have not gotten to discrete math in university, so I really do not know how...

Ok, thanks. And I know this is not part of the problem, but on the sides of the circle, what would the directions for normal force and weight be?

So I guess the normal force should be in the same direction as the weight? Thank you, that did give me the correct answer but I'm confused as to why this is happening or why it matters that he is upside down...I guess I don't fully understand what exactly the normal force is. I've really only...

Homework Statement A pilot flies an airplane in a vertical circular loop at a constant speed of v = 160 m/s. If the pilot's apparent weight at the top of the loop is one-third of his true weight on the ground, find the radius R of the plane's circular path. Answer: R= 1960m Homework...

Thank you, I don't know why I didn't see that. I now have the correct answer. I'm still a little shaky on when you use components for certain things even after reading over aim's explanation again. Could someone else try explaining this in a different way if possible?

I sort of understand your explanation. I'll have to read over it again, but thanks. Btw - If I use N*sin(theta) + mu * N * cos(theta) I get frequency to be equal to .788, which is still not correct. Here is a picture of the updated work:

Block inside a spinning cone -- Newton's 2nd Law problem Homework Statement See attempt at solution. I have attached everything there.Homework Equations F_net = m * a_n (net force) W = mg (weight) a_n = 4*pi^2 * R * f^2 ... formula for "normal" component of acceleration where R = radius, f =...

What is "ve"? EDIT: Nevermind, you mean -ve = "negative" haha. I'm a little slow tonight, nevermind! I understand, thanks.

Thank you, that did give me the correct answer. Are you saying the acceleration should be negative on block A since it is traveling in the -x direction (left)?

Homework Statement See attempt at solution. It has everything.Homework Equations F_net = ma (net force) W = mg (weight) f_k = u_k * N (frictional force - kinetic) T is the tension force. The Attempt at a Solution See attachment below. I realize I just posted a problem related to a two block...