Power questions 19 August 2011 17:30 PFY, p. 120 [cid:image001.png@01CC7861.A7A2D8D0] [cid:image002.png@01CC7861.A7A2D8D0] Answers: f) Power is the rate of doing work Power (In Watts) = work done (in Joules) / time (in seconds) g) 1 watt is the rate of working at one Joule per second 13. P = Wd/t = 1000/5 = 200W 14. P = Wd/t Work done = force x distance = 300 x 2 P = 600/6 = 100W 15. P = Wd/t Work done = f x d = 3000 x 10 P = 30000/4 = a) 7500W => b) 7.5kW
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