Answer:
Mass, m = 6.25 kg
Step-by-step explanation:
It is given that,
Net force acting on the object, F = 25 N
Acceleration of the object,

Let m is the mass of the object. Using Newton's second law of motion. The force is given by :
F = ma


m = 6.25 kg
So, the mass of the object is 6.25 kg. Hence, this is the required solution.