Recent content by ijkijk

Yes, The ball #2 will only have translational energy and in the process of its rotation speed increasing from 0 to \omega, much energy lose. No. If it(#1) just roll and don't slide on ramp, then NO energy will be lost. it is because of static friction doing no work. the smoth one's...

faraday's law is applied to LOOPs.(you can only say electric flux through loop instead of line) so you need be aware of what LOOP that you consider(choice). if you choice loop IN the rod, then the LOOP's emf really is zero. //you explained it right, and another interpretation is -E+E=0...