phy
posted by merle on .
. 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=work/time=mgh/timeinsseconds
posted by merle on .
. 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=work/time=mgh/timeinsseconds