A skier is standing motionless on a horizontal patch of snow. She is holding onto a horizontal tow rope, which is about to pull her forward (see Figure 4.22a). The skiers mass is 59 kg, and the coefficient of static friction between the skis and snow is 0.14. What is the magnitude of the maximum force that the tow rope can apply to the skier without causing her to move?
Monday, March 10, 2014 Time-dependent EM effects We already discussed that electric and magnetic fields are two side of an electromagnetic field. The relation between electric and magnetic fields is most important through time-dependent effects 2 Recall Maxwell’s equations ∇· E = ρ/ 0 ∇· B =0 ∇× B = µ J + µ ∂ E 0 0 0 t ∇× E = −∂ B t changing B-ﬁeld produces E-ﬁeld and vise versa Electromagnetic induction Start with changing B-ﬁeld producing E-ﬁeld 3 Faraday’s Experiments (1)