Here's how to solve this problem using Newton's Second Law of Motion:

Newton's Second Law:

* F = m * a

Where:

* F is the force (in Newtons)

* m is the mass (in kilograms)

* a is the acceleration (in meters per second squared)

Given:

* F = 4500 N

* a = 5 m/s²

To find:

* m = ?

Solution:

1. Rearrange the formula to solve for mass (m):

m = F / a

2. Substitute the given values:

m = 4500 N / 5 m/s²

3. Calculate the mass:

m = 900 kg

Therefore, the mass of the object is 900 kilograms.