Re: Help on finding a website with physics problmes

John Travolta Sardus wrote:
Hi to all,
some time ago (> 2 years) I found a great webiste with physics problems. I tried now to locate it with Google and I have not been able to. It is even possible that, given that Google is very powerful, the website does not exist anymore - I want to try and see if anyone knows its web address though.

The hints I can supply are three problems that I found over there and a few vague recalls on how the site was organized.

Problems (I am not looking for the solution of these, just for the website where I found them first and I am sure I can find many more!)

- A climber is climbing a "mountain peak" that is a perfect and frictionless cone. He has a rope that he arranges into a loop around the cone's tip. It is clear that if the cone's apex angle is very small, the loop won't slip off it, while when the angle is large ("flat cone") it will. What is the maximum angle for which the loop won't slip off the tip of the cone?

- A cyclist is riding on a wet road. He has no fenders. What is the maximum speed for which he won't get his back wet?

- (I am not sure whether the text of the third problem is quite exact) A ball (of small mass) is resting on the ground. Someone drops a plank (of large mass) onto it. The drop is such that the plank does not acquire angular momentum ("dead on"). And it is elastic. Does the ball bounce and if yes, by how much?


I recall moreover that the site added periodically (maybe weekly) new problems, and there was a page where to each link to each problem's text there corresponded a link with a hint and a link with the solution (some maybe were just tentative solutions). I also recall that some of the problems were taken from the notebook of some famous physicist, but I cannot recall the name. I googled Kapitza notebook because I seem to remember an Eastern European name, but I didn't get the result I wanted.

Thanks in advance!




I didn't find your resouce, but here are some good ones... among others
http://www.google.com/search?q=%22physics+problems%22
.

Relevant Pages

  • Help on finding a website with physics problmes
    ... some time ago I found a great webiste with physics problems. ... tried now to locate it with Google and I have not been able to. ... while when the angle is large it will. ... I recall moreover that the site added periodically new ...
    (sci.physics)
  • Re: Help on finding a website with physics problmes
    ... some time ago I found a great webiste with physics problems. ... It is even possible that, given that Google is very powerful, the website does not exist anymore - I want to try and see if anyone knows its web address though. ... It is clear that if the cone's apex angle is very small, the loop won't slip off it, while when the angle is large it will. ... I recall moreover that the site added periodically new problems, and there was a page where to each link to each problem's text there corresponded a link with a hint and a link with the solution. ...
    (sci.physics)
  • Salmonella enterica serotype Kentucky ST198-X1 and Salmonella Heidelberg - repeat post
    ... on the main Google search, but remains missing from the useful Google ... Two animal health and food safety giants, Maryn McKenna and Bill ... about antibiotic resistant Salmonella Kentucky. ... Associated Press published a bulletin that Cargill Inc. will recall 36 ...
    (uk.business.agriculture)
  • Re: Do Spitfires fly over Silverstodge?
    ... It was a bit more than ugly rumours. ... I don't see any obvious good source in Google results either, ... just a tabloid report. ... I recall him explaining his logic for why it ...
    (rec.autos.sport.f1)
  • Re: Cost of changing a stop light bulb?
    ... altering their angle, no. ... Having a quick google, though, suggests that there's actually a variable- ... height shade screen which masks off the respective part of the lamp. ...
    (uk.rec.driving)