9. Katie, a 30 kg child, climbs into a tree to rescue her cat who is afraid to 9) jump 8.0m to the ground. How much work does Katie do in order to reach the cat? 10. Marissa does 3.2 J of work to lower the window shade in her bedroom 10) a distance of 0.8 m. How much force must Marissa exert on the window shade? 11. Atlas and Hercules, two carnival sideshow strong men, each lift a heavy barbell above their heads. Hercules lifts a 200 kg barbell 2.00 m off the ground in 3.00 s. Atlas lifts his 150 kg barbell in 1.00 s a distance of 1.6m off the ground. 1la) a) Which strong man does more work? b) Who has more power? 1 1b) 12. The graph below shows the relationship between the work done by a student and the time of ascent as the student runs up a flight of stairs. Work vs. Time 12) Work (joules) Time (seconds) The slope of the graph would have units of