Ablock of mass 3 kg slides down a frictionless inclined plane of length 6 m and height 4 m. if the block is released from rest at the top of the incline, what is its speed at the bottom?

(if it's frictionless the length doesn't even matter :) )
It would have the same kinetic energy down as the potential energy up. That is, or (the mass doesn't even matter). The result is , so only the height matters really. It is almost 9 (it is ).

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;