Is If the launch speed is fixed to be v, prove that the furthest distance is achieved when the launch angle is 45º.
Hint: Write out your x and y directions in terms of the variable 0 (launch angle). Combine
them and show that the max Ax is achieved when 0 = 45°

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