Recent content by talisman2212

You haven't understand the problem at all, anyway I found the solution.

I must determine the relation between k and the slope of the inclined plane. I am writing at the top of the topic what I have tried, I found g=ksin(θ) this is wrong. I am trying to use the trigonometry of the problem (no sees that??). Can someome really help me to find the relation between k and...

The equation should say k=sin(θ)g, I am writing above what i have tried. Can someone help me to prove it?

That's wrong. k is related to the slope of the inclined plane and is independent from the weight. If we use Newton's law we have mk=mgsin \theta \Rightarrow k=gsin \theta I must prove this (without using Newton's law).

Homework Statement Galileo in seeking to discover the laws governing the motion of bodies under the action of their weight, conducted a series of experiments on inclined planes. Choosing as unit of length the distance traveled by the ball the first unit of time, measuring at subsequent time...

Sorry, is the angular acceleration. How I find T now?

I used the small angle approximation where sin\theta\approx\theta and I'm here: a(t)=-\frac{L}{g}\theta(t) where a(t) is the angular momentum in a given time t. How I will find now that T=2\pi\sqrt{\frac{L}{g}}?

How I will derive it?

I know that, but our teacher told us to compute it anyway.

I know how to comptute the time in chord but I can't compute the time in the arc.

Our teacher told us that it can be solved without using the pendulum. I have tried lot of things but can't find it.

Homework Statement We let a ball with mass m to slide down under the influence of his weight the path defined by the chord or the path defined by the arc of the circle until the ball reach the lowest point, as it seems from the picture. In which path the ball will make the shorter time to...

look here: http://en.wikipedia.org/wiki/Magnification

What mathematics did Perelman use to prove Poicare's conjecture? Do you know any guide or any book?

with finite domain, continuous functions and the Euclidean metric.