The inclined plane in the picture below has a force advantage of 4. This means... Select one:
a. it takes 16 times more force to lift the crate without the inclined plane.
b. it takes 4 times more force to lift the crate without the inclined plane.
c. it takes 1/4th as much force to lift the crate without the inclined plane.
d. it takes 8 times less force to lift the crate without the inclined.

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