Recent content by Y*_max

I'm getting more and more confused. The moment of intertia is the area under a curve, right? Then, of what curve? What kind of function is involved? Is there a way to approach this integral as I approached the integral of the center of mass? Thanks again for your help ;)

No, it does not. Here is the explanation the book gave the first time it expressed an infinite sum as an integral (when discussing center of mass): "An ordinary object, such as a baseball bat, contains so many particles (atoms) that we can best treat it as a continuous distribution of matter...

Actually, I did find this wesbite. However, it is another example of what I said earlier: on the internet, functions are involved. When functions are involved, integration makes sense because the sum is the area under the curve. However, here, I don't see a function. Thus, I don't understand why...

Well, I wouldn't have posted this question hadn't my preliminary Google research been unsuccessful. On the internet, functions were always involved; but here, I don't see one, for the reasons I stated above. And yes, I know that what is written in the textbook is right, but my question aims at...

Hello, I am currently attempting to cover rotational motion using Halliday's Fundamentals of Physics. I understand very well the concept of moment of inertia as defined as the sum Σmi*ri2. However, the textbook argues that if there are too many particles, the moment of inertia can be defined as...

Oh, I see! Thank you very much to you all!

Homework Statement Figure 8-36 shows an 8.00 kg stone at rest on a spring. The spring is compressed 10.0 cm by the stone. (a) What is the spring constant? 2. Relevant formula Mechanical energy is conserved The Attempt at a Solution The decrease in gravitational potential energy that occurs...

I am indeed familiar with titled coordinate systems. But what you mention would rather look like this, wouldn't it? http://img.sparknotes.com/content/testprep/bookimgs/sat2/physics/0014/tablewpulleyFBD.gif This way of dealing with the problem doesn't seem very intuitive to me. I'm used to using...

Are you suggesting using F=ma for both blocks at once? What do you mean by "the coordinate will bend at the pulley"? Is it mathematically consistent? I mean, I've never seen a coordinate system bending along the way.

Thanks for you help lightgrav ;) The rope runs parallel to the incline. I don't understand your next question, however. I mentioned the acceleration's components above; is that what you are talking about?

Thank you for your answer! :) Oops, I did forget the signs indeed. Here's something better: Block 1's acceleration's coordinates are: (vector)a (-sinθ*g+T/m1, -cosθ*g +N/m1) Block 2's acceleration's coordinates are: (vector)a' (0,T/m2-g) Since the rope is non-stretchable, ax and a'y have the...

Homework Statement A block of mass m1= 3.70 kg on a frictionless plane inclined at angle θ=30.0° is connected by a cord over a massless, frictionless pulley to a second block of mass m2=2.30 kg. What are (a) the magnitude of the acceleration of each block, (b) the direction of the acceleration...