Aboat is moving due east in a region where the earth's magnetic field is 5.0 × 10^5n/am due north and horizontal. the boat carries a vertical aerial 3m long. if the speed of the boat is 2.50 m/s, what is the magnitude of the induced emf in the wire of aerial?
a. 3.75 × 10^-4 v
b. 3.75 × 10^-4 mv
c. 375 × 10^-4 v
d. 1 mv
e. none of the above

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f