Recent content by Calias

Your calculated value is correct if you assume there is no friction at all. Since there apparently is friction, the system actually has to do more work to lift the object. Howmuch more work it has to do is given in the question, as you quote yourself in post #5.

Well, that's true to some extent.. I could describe into detail why grass is green, what forces act when it blows because of the wind, but that's boring and I doubt anyone would be interested in reading a 10+ pages report about 1 blade of grass. Since I can't make up anything that would be...

Hello, I'm a first year (Applied) Physics student (in Holland, writing style mistakes preserved :) ), and for quite an easy subject i have to write an approximatley 12 pages long report about an appearance I can physically describe. It doesn't need to be complicated, it doesn't have to be...