Recent content by mathewmical

But it's no homework :(

Hallo, I Wonder how i can get the equation of motion for a tilting Stick of mass M and lengh L with an additional mass m placed in it in distance of l from the Center of rotation. I thought about the moments of inertia Can anybody help? Thanks in advance

well no, but somehow it should be possible, I've read . if i cancel that thought, how could i solve the problem then?

i wonder if it is possible to get the efficiency of an LED just by knowing the radiant power an the outside temperatur. i also know the temperatur of the emmited light. well they say the LED has an efficiency >1 because it takes heat from the out side and turns it into rays. so these two things...

Okay then, but thank you very much for all your quick replies!

But it´s possible right? if i can calculate the magnetic field of the coil, i´d be able to ?

That´s all? then is there a way to calculate the velocity?

or wait could it be that first there's an acceleration, but due to the voltage induced by the fixed magnets the voltage of the battery will be compensated so it will remain with a constant velocity?

FR refers to the force one magnet exerts on the other one (R due to 'repelling'). maybe if i manage to calculate the force I can figure out the acceleration between two loops.

okay i just got another idea: if i only focus on, like, 3, single loops. if the battery touchs two of them, the current flows and the like pols repel each other with FR, so on the battery there will be twice the force because of Newtons third law. the same with the unlike poles . so all in all...

thanks a lot

isn´t working. so i´ll post it here:http://www.waynesthisandthat.com/images/HT%20994.jpg

okay i´ll do so :D

of course, but theforce from gravity is only important for the friction and the normal force neutralize it. right?

hmm i just thought there are only horizontal forces because of the friction