3. in 1989, michel menin of france walked on a tightrope suspended under a
balloon nearly at an altitude of 3150 m above the ground. suppose a coin falls
from menin's pocket during his walk. how high above the ground is the coin
when its speed is 40 m/s?

does anyone know the answer ?

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