Question

6. A star of mass 1.4M SuN (is the Sun's mass, a convenient mass unit in Astronomy) is a great distance from another star of equal mass and is approaching the second star at v 680km /s. The two stars undergo a close encounter (considered a collision) and much later the first star is moving at a θ-350 to its initial direction. In the frame of reference in which the second star is initially at rest v2, 0, find the final speeds of both stars vr, vr and the direction of motion of the second star 0-59" Ignore values in the diagram) 7. A downhill skier, mass m, is on waxed skis that are essentially frictionless (f-0). Assume the hill has height h and the hill's incline is θ. (e.g., h = s sin@) a) What is the work (W) done as the skier travels a distance s down the hill Express results in terms of m, g and h. Work-Energy theorem. done (W) and the final velocity (v,) at the bottom of the hill. b) What is the skier's speed (v,) on reaching the botton of the run? Apply the c) Given: m-80kg, v, = 0Orn/s, h-52.0m, and 6-25°; find the work DownHill Skier Diagram of cos 25 25

Answer 1

个 Work done Fore >< duh lace ment SunCo final Speed 8 Accor ding to uossk enoxgy Reram, uocrcr dane by a body is equal to chamge un Ke : 185

a- as。 Horu USこ40.8 KJ amd u3194 ms 85x ON