Safari File Edit View History Bookmarks Window Help 28 100% 27 Thu 9:56 PM Q DE . . . O E webassign.net C 808 In Grades: View M Inbox (4,445) - griseldapepaj@oakland.edu - Oakland University Mail W Phy 1010 - W22 - Chapter 5 - PHY 1010 - W22 - Castoldi, Winter 2022 |... Use the worked example above to help you solve this problem. A 61.0 kg skier is at the top of a slope, as ne shown in the figure. At the initial point , she is 9.0 m vertically above point B. (a) Setting the zero level for gravitational potential energy at B, find the gravitational potential energy of this system when the skier is at @ and then at B). Finally, find the change in potential energy of the skier-Earth system as the skier goes from point & to point B. PE; = PEf = APE = (b) Repeat this problem with the zero-level at point . on PE; = ocs PEf = APE = (c) Repeat again, with the zero level 2.00 m higher than point B). hive PE; = PEf = APE = on pcs EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. If the zero level for the gravitational potential energy is selected to be midway down the slope, 4.50 m above point , find the initial potential energy, the final potential energy, and the change in potential energy as the skier goes from point to B in the figure. initial kJ final KJ change kjREMARKS Substituting the symbolic expression v. = 2gh into the equation for the distance d shows that d is linearly proportional to h: Doubling the height doubles the distance traveled. QUESTION lee two reasons why skiers typically assume a crouching position when going down a slope. (Select all that apply.) Q The acceleration of gravity g is increased by crouching. Q Crouching lowers the skier's center of mass, making it easier to balance. [3 Crouching decreases the skier's inertia. [3 In the crouching position there is less air resistance. [:1 Crouching decreases the mass of the skier. PRACTICE IT Use the worked example above to help you solve this problem. A skier starts from rest at the top of a frictionless incline of height 20.0 m, as shown in the gure. At the bottom of the incline, the skier encounters a horizontal surface where the coefcient of kinetic friction between skis and snow is 0.195. Neglect air resistance. (a) Find the skier's speed at the bottom. m/s (b) How far does the skier travel on the horizontal surface before coming to rest? EXERCISE HINTS: GETI'INGSTARTED | I'M STUCKl Use the values from PRACFICE IT to help you work this exercise. Find the horizontal distance the skier travels before coming to rest if the incline also has a coefcient of kinetic friction equal to 0.195. Assume that 9 = 20.0. [TI