6.__friction acts on objects that are not moving. * which one is the answer ? (Science)

rolling

static

sliding

Gunpowder residue is most likely to show up where on a shooters hands

Which two particles are found in the center of an atom

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