Recent content by MinaHany

Thanks a lot for all your help chiro! That was very useful. Have a nice day :)

Wow! Thanks a lot for this it was very helpful. Would I be asking too much for an example where the limit exists? Just a very simple one will do. Sorry for all the questions chirno!

I think I'm close to understanding the whole thing. Would you please explain this with a simple example?

Thanks a lot for your fast reply chiro. I understood most of what you said perfectly. I know when a limit does not exist and the contradiction between LHS and RHS, etc.. There's only one part I didn't quite understand: "Basically you can think about this in the way that there is some point for...

Hello all, This is very simple however I would like to understand why this is true. According to the definition of a limit, if we have limit of f(x) as x approaches infinity = a then for every ε>0 there exists a real number M such that if x>M then the absolute value of f(x)-a < ε. This...

the friction produces the torque i guess.. because if we have no friction we don't have a turning force and thus there is no torque. and acceleration= r times alpha

okay so we have: components of the weight, normal reaction from the incline, friction (because surface can't be frictionless if the body is rotating), we have the turning force producing the torque so there are acceleration and alpha down the incline. Have I missed anything?

Thank you for the quick reply Doc Al. I just need some help on the way.. All I know is the component of weight acting on the body down the incline is mgsin(theta) I've never drawn a free body diagram with rotational motion before.. I know that the torque is also applied on the body, but how do...

Homework Statement I am trying to find an equation relating the acceleration (not angular acceleration) to the moment of Inertia. I have a question that says a coin and a ring have same mass and same radius, which one would reach the bottom first if they were released from the top of an...

Thank you sethric.. I wrote that final KE = inital KE rotational KE + KE of the mass = PE of the mass and v=wr to get the v of the mass when the w is 3 rev/s Best thing around here is nobody gives the answer.. everybody gives you the ideas you need to understand to be able to solve the...

I'm sorry for posting another thread but I'm totally lost here.. Homework Statement A wheel and axle having a totel moment of inertia of 0.002kgm is caused to rotate about a horizontal axis by means of an 800g mass attached to a cord wrapped around the axle. The radius of the axle is 2cm...

Thank you Doc AL and lewando.. Your replies made the idea clear for me.

Homework Statement A 20kg solid disk (I=1/2Mr^2) rolls on a horizontal surface at the rate of 4.0m/s Calculate its total kinetic energy The Attempt at a Solution I think that simply equating the KE to (0.5)(m)(v^2) would be a wrong solution because then I would not use the moment of...