While driving, if you need to use your cell phone, using a hands-free phone will keep your mind on driving you should pull over to use the phone it is risk-free to have the conversation in a low-traffic environment it is completely safe as long as you keep your eyes on the road?

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