The mass of object is 42.6 kg
Solution:
Given that,
Acceleration = 2.63

Applied unbalanced force = 112 N
To find: mass of object
Newton's second law gives the relation between the applied force and the acceleration produced by it. Mathematically, it can be written as :

Where, "m" is the mass and "a" is the acceleration
Substituting the given values we get,

Thus mass of object is 42.6 kg