Abird flies from the south pole to the north pole. part of the journey is 1000 miles that takes 2 weeks. what is the bird’s velocity in that time? show work for credit and include final units.

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