A person jumps from a fourth-story window 15.0m above a firefighters safety net. The survivor stretches the net 1.0m before coming to rest. What was the average deceleration experienced by the survivor when she was slower to rest by the net? What would you do to make it “safer” (that is to generate a smaller deceleration): would you stiffen or loosen the net? Explain.

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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