5. A cyclist rides up a hill of vertical height 100m in 500s at a constant speed. The combined mass of the cyclist and the bicycle is 80kg. The power developed by the cyclist is 200W. What is the efficiency of the energy transfer in this system? A. 8% Energy output loom . 80 Energy input B. 20% 500 5 (0.2) 2 2. 30 C. 60% 0.2 . 80)2 2005 D. 80% 2 . 80 200