Answer :
According to the Newton's second law,
[tex]F=ma[/tex]where F is the force on the object, m is the mass of the obect and a is the acceleration of the object.
Substituting the known values,
[tex]30=m\times5[/tex]Thus, the mass of the object is,
[tex]\begin{gathered} m=\frac{30}{5} \\ m=6\text{ kg} \end{gathered}[/tex]Hence, the mass of the object is 6 kg.