Answer
a) Mexico City, g = 9.779 $m$/$s^{2}$
$F_{gravity}$ = $mg$ = (80 $kg$)(9.779 $m$/$s^{2}$ ) = $782.32$ $N$
b) Cape Town, g = 9.796 $m$/$s^{2}$
$F_{gravity}$ = $mg$ = (80 $kg$)(9.796 $m$/$s^{2}$ ) = $783.68$ $N$
c) Tokyo, g = 9.798 $m$/$s^{2}$
$F_{gravity}$ = $mg$ = (80 $kg$)(9.798 $m$/$s^{2}$ ) = $783.84$ $N$
d) Chicago, g = 9.803 $m$/$s^{2}$
$F_{gravity}$ = $mg$ = (80 $kg$)(9.803 $m$/$s^{2}$ ) = $784.24$ $N$
e) Copenhagen, g = 9.815 $m$/$s^{2}$
$F_{gravity}$ = $mg$ = (80 $kg$)(9.815 $m$/$s^{2}$ ) = $785.2$ $N$
Work Step by Step
Same as above