Constant velocity means............
applied force=frictional force=p=kinetic friction coefficient*mg=0.26*10*9.8=?
now we know .... work=force*distance=0.26*10*9.8*0.87joule
plz feel free to ask if u hv any confusion!!
B) A magnetic field is created around the wire.
This idea is one of the fundamental ideas of physics - an electric current has a magnetic field, whether it's moving through a wire or space.