As we know that mass of the box is given as
m = 9.5 kg
acceleration of the box is given as
[tex]a = 1 m/s^2[/tex]
so by Newton's II law we can say
[tex]F = ma[/tex]
now we can substitute all the values in it
[tex]F = 9.5 \times 1[/tex]
[tex]F = 9.5 N[/tex]
So it required 9.5 N force to slide it