6. K As a skier descends a slope, her kinetic energy increases from 600 J to 3 200 J while her gravitational potential energy decreases by 5 900 J. How much heat energy is created due to friction? A. 2 100 J B. 3 300 J C. 8 500 D. 9 700 J 7. A Calculate the minimum power of a cyclist who can increase his kinetic energy from 480 J to 2 430 J by travelling 26 m in 4.0 s. A. 75 W B. 3.6x102 W C. 4.9x102 W D. 7.3x102 W 8. K Rene, whose mass is 85 kg, skis down the hill, passing Z with a kinetic energy of 9 700 J. Z If friction is ignored, to what maximum height, h, can Rene ski? A. 12 m B. 15 m C. 1.1 x10' m D. 6.6x103 m