Chapt. 8 Potential Energy and Mechanical Energy 83 e) No one wants to. 008 qmult 00400 1 1 1 easy memory: power defnition Extra keywords: physci 17. Work per unit time or energy transFormed per unit time is: a) power. b) might. c) oomph. d) strength. e) pay. 008 qmult 00470 1 5 3 easy thinking: sunlight power Extra keywords: physci KB-99-17 18. IF you could capture it all For useFul work, the energy sunlight delivers to a square meter oF ground would run one or two ordinary incandescent light bulbs. The power delivered by the Sun to a square meter oF ground on average is to order or magnitude: a) 1 W. b) 10 W. c) 100 W. d) 10 6 W. e) 1 MW. 008 qmult 00472 2 5 2 moderate thinking: boy running up stairs Extra keywords: physci KB-93-23 19. A 50 kg boy runs up a ±ight oF stairs oF 5 m in height in 5 s at a constant rate. His power output just to work against gravity is: a) 50 W. b) 490 W. c) 980 W. d) 10 6 W. e) 1 MW. 008 qmult 00474 2 5 2 moderate thinking: mountain climber power output
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