If the length of a resistance arm of a lever is 15,5 m, and the length of the effort arm is 2.50 m, what is the mechanical advantage of the lever? O A 0.16 O B. 1.0 O C. 1.16 OD 2.0​

Describe uniform velocity and variable velocity in short

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

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