Mastering Physics: HW 7 Google Chrome https:// mastering physics.com /myct/itemV
ID: 1413225 • Letter: M
Question
Mastering Physics: HW 7 Google Chrome https:// mastering physics.com /myct/itemView? assignment ProblemID 63241381 Session signed in as Alexander Dye Help I close Summer A, 2016, PHYS 1111 B 1113BB HW 7 PSS 7.1: The Coefficient of Kinetic Friction of a Skier Resources previous l 8 of 11 l next PSS 7.1: The Coefficient of Kinetic Friction of a Skier Learning Goal: ma To practice Problem-Solving Strategy 7.1 Work and mg mg kinetic energy. (Figure 1) Marjan, a skier of mass m, coasts a distance s on level snow to a stop from a speed of v, as depicted in the figure. Use the work-energy principle to find the coefficient of kinetic friction Auk between the skis and the snow. Hints My Answers Give Up Review Part Correct Part B Figure 1 of 1 What is the initial kinetic energy of the skier? What is the final kinetic energy of the skier? Enter the initial and final kinetic energy separated by a comma mv2,0 Hints My Answers Give Up Review Part Correct Part C What is the net force on the skier in thex direction? Enter an expression for the net force in terms of some or all of the variables given in the problem.Explanation / Answer
c)
Net force x displacement = change in KE
Fnet x s = 0 - (0.5) m v2
Fnet = - m v2 /2s