An object is lifted at constant speed a distance h above the surface of the Earth in a time t. The total potential energy gain of the object is equal to? a. the average force
applied
b. the object’s total
weight
c. the total work
done on the object
d. the object’s
acceleration

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