Weight of an object is defined as attraction force due to gravity
so here we will have
[tex]W = mg[/tex]
now we know that
[tex]W = 147 N[/tex]
mass = 15 kg
now acceleration due to gravity is given as
[tex]147 = 15\times g[/tex]
[tex]g = \frac{147}{15}[/tex]
[tex]g = 9.8 m/s^2[/tex]
so here acceleration due to gravity is 9.8 m/s^2