Explanation:
The force of gravity that acts on a body is called weight [tex]W[/tex] and is defined as:
[tex]W=m.g[/tex] (1)
Where:
[tex]m=100kg[/tex] is the mass of the box
[tex]g=9.8m/s^{2}[/tex] is the gravity at sea level
Substituting these values in (1):
[tex]W=(100kg)(9.8m/s^{2})[/tex]
[tex]W=980N[/tex]
