F) power is the rate of doing workPower questions19 August 201117:30PFY, p. 120
power (in watts) = work done (in seconds)/ time (in seconds)
G) 1 watt is a rate of working of one joule per second
13. P = E/t = 1000/5 = 200w
14. Wd = Fx d = 300 x 2 = 600J P= E/r = 600/6 = 600J
16. Wd = Fxd = 300 x 10 = 30,000J P= E/t = 30000/4 = 7500
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