Answer: 735 N
Explanation:
Weight [tex]W[/tex] is a measure of the gravitational force acting on an object and is directly proportional to the product of the mass [tex]m[/tex] of the body by the acceleration of gravity [tex]g[/tex]:
[tex]W=m.g[/tex]
In the case of our planet Earth, the acceleration due gravity is [tex]g=9.8 m/s^{2}[/tex]. So for a man whose mass is [tex]m=75 kg[/tex], his weight is:
[tex]W=(75 kg)(9.8 m/s^{2})[/tex]
[tex]W=735 N[/tex]
