Outlook Mastering Physics Connect kg skier skis without friction down a slope which is 100m high and along a path that is 200m long. w a picture. g = 9.8m/s Part A How fast is the skier going at the bottom of the slope? O 24.8 m/s 31.4 m/s O 13.3 m/s 44.3 m/s O 65.1 m/s Submit Request Answer Part B Next, suppose the same skier descend the same slope but with friction which cause the speed at the bott to 15m/s. What is the change in the total mechanical energy in this descent? Find the magnitude of the friction force? xt, suppose the same skier descend the same slope but with friction which cause the speed at the bottom to be reduced 15m/s. hat is the change in the total mechanical energy in this descent? O 260 N O 28.6 N O -5.21x104 J 460 N O -4.32x104 J 85.8 N O -1.85x104 J 343 N O -6.41x104 J O -3.44x104 J Submit Request Answer Submit Request Answer Part E Part C If an additional 20kg backpack is put on the same skier, the magnitude of the friction force will, Find the work done by the force of friction on the skier. increase -2.34 x104 J stay the same. -5.21x104 J decrease