What is Mechanic: Definition and 121 Discussions

Homework Statement In the attachment. Homework Equations The Attempt at a Solution

Homework Statement http://img41.imageshack.us/img41/6579/mechanics2.jpg Homework Equations w=\frac{d\theta}{dt} (1) v=rw (2) F=ma (3) a=\frac{v^2}{r} (4) The Attempt at a Solution For (i), from (2) and (4) I get a=rw^2 and I'm thinking r=\frac{F}{cos\theta} but I'm not...

How do you remove the electric window motor from inside the door of a truck?

Please take a look on this paradox. http://knol.google.com/k/alex-belov/paradox-in-classical-mechanic/1xmqm1l0s4ys/3# What do you think?

HEY...so here I go! Abstract: To determine the level of independence between an introductory solid state course to an introductory quantum mechanics course. The deal is I’m going in my third year of a Bsc with honours (yes Canada lol) and specialization in Physics-Mathematics and I’m...

I first met with the prime numbers problem at a greek novel and than I interested with the works of Cahit Arf. Please correct me , Zeta Function Zero is a proof to tell , there is a mechanical relation at all prime numbers , and there is a regularity. If this is correct , it would be very...

Dear smart people, I am not so smart but consider myself above the average mechanic. However i have come across information from highly respeced racing mechanics that i can't make sense of. I have researched this subject for a while and it seems everyone gets it but me It involves the...

1)A cup contain 15cm lvl water. A 29cm straw is place into the cup, at the end of the straw is 1cm from the bottom. If a person sucks on the straw, what gauge pressure is needed at the top of the straw to allow the water to run out of the top and into his mouth. P=pgh 1000(9.8) .29 = 2842 Pa...

can anyone help me on the second question? i found the part a is 1400 * 0.1 m = 140N, part b is 6.6m, part c is 14J, part d is but i don't know how to do the last two part... help please! is this correct? w=mgcos60 x 6.6m = 6.468 J.. i don't know which distance should i use~ 0.1m or 6.6m...

When I blow some air though two pieces of paper, the experience told me that two pieces of paper will move toward each other. However, there should be work done by me on the air I blowed that changes its total pressure. As there is a work done, we cannot simply apply Bernoulli's equation. So...

Schroedinger, Erwin! Professor of physics! Wrote daring equations! Confounded his critics! (Not bad, eh? Don't worry. This part of the verse Starts off pretty good, but it gets a lot worse.) Win saw that the theory that Newton'd invented By Einstein's discov'ries had been badly dented...

Hi I am trying to figure out reactions in the mechanic construction which is here http://img.photobucket.com/albums/v309/Andreii/nalogca.jpg" . Datas of construction are: L1 = 7.1m L2 = 1m L3 = 0.2m F = 2.8 kN = 2800N M = 1.3 kNm = 1300Nm (this is torque) p = 2.5 kN/m = 2500 N/m p...

Hello everybody,I am from China,and I majored in mechanic and electronic in a college. now I want to devotee myself to physic. Anybody experienced,do you think it is possible and wish you some advice. Thanks for reply,my e-mail is daifeili@163.com:smile:

How many famous paradoxes in Quantum Mechanic? 1. Schrödinger’s cat 2. Einstein, Podolsky, Rozen paradox What else?

\widehat{H} = \frac{p^2}{2m} + V(x) if eigenvalue of H operator is E_n and eigenvectors are u_n, show that \Sigma_m (E_m-E_n) |x_{mn}|^2 = \frac{\hbar^2}{2m} is true. here, x_{mn} = (u_m, xu_n) is a matrix element.

I hope someone's help. If someone has some idea of following thing, please write your idea here. Problem: There is a spring(spring constant: k) fixed on the floor with massless board fixed upside of it. Peter put a box of m(kg) on the board and make spring in a state of equilibrium.Peter want...

How should Vo and Theta should be chosen (and why), in order to making the distance X minimum? Consider that theta can be any number between 0 and 90 and Vo can go from 0 to a maximum value.

We have to choose project in school about the lessons we take. I chose physics, and decided to compose the project about mechanic energy. Actually I purposed to explain the formulas with a simple experiment. In my idea, we leave the ball (enough highness) with no velocity into a big...

Hi guys.. this is my first post. Sorry if I use terms that you don't use since I translate it from french.. I need help doing this problem. I tried it a few times but I can't find the answer. I tried to do the V(x) (speed or velocity I think) and find it from there but still can't manage to...

I have a problem for HW that is driving me crazy! A copy of the original problem from the text is attached. Here is what I have done so far... First, I split the area under the force horizontally into two triangles and found the centroid of each. Centroid of upper triangle is 3m from...

Bohm mechanic...is that true?.. i have been interested about bohmian mechanics.. i do not know why is not taught at university or why is taken appart in benefit of the ortodox (and non deterministic quantum mechanic)..in fact i think that there is no a physical argument that says this theory is...