Physics
posted by Sabrina .
Show that 480 W of power is expended by a weightlifter when lifting a 60kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

Power = F*d/t = mg*d/t
=(60*10)*1.2/1.5 = 480 J/s = 480 Watts.
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