Solution.
We will first calculate the weight of the man on the moon.
Here, Mass of the man on moon, $m=70 \mathrm{~kg}$
Acceleration due to gravity, $8=1.63 \mathrm{~m} / \mathrm{s}^{2}$
(on the moon)
We know that: $\quad W=m \times 8$
So, $\quad W=70 \times 1.63$
$W=114.1 \mathrm{~N}$
Thus, the man would weight 114.1 newton on the moon.