Notes from Glencoe _Physical Science_
p. 201 POWER

power = work/time or P (watts) = Work (J)/time (sec)

A watt is pretty small--about equal to the power used to raise a glass of
H2O from your knees to your mouth in one second.

--
How much power is used to lift a 500-gram mass one (1) meter in five (5) 
seconds:
P (watts) = (5N x 1m) / 5 sec
P = 1 J/sec or 1 watt

Current record time:
Congratulations Maddie White, for your record-setting time of 5.54 seconds 
-- you are the most powerful student at Sandburg MS! [Spring 2008]
P = 5 J / 5.54 sec
P = 0.90 W

old record:
5.85 sec (Evis Espinoza, 06/2006)
P = 5J / 5.85sec
P = 0.85 watts

==
http://en.wikipedia.org/wiki/Watt
watts or "W" (capitalized)