1. Identify the Forces:

* Gravitational Force (Fg): This acts downward and is calculated using Fg = mg, where:

* m = mass (1.4 kg)

* g = acceleration due to gravity (approximately 9.8 m/s²)

* Air Resistance (Fair): This acts upward and is given as 2.5 N.

2. Calculate the Net Force:

* The net force (Fnet) is the vector sum of all forces acting on the object. Since the forces are in opposite directions, we subtract them:

* Fnet = Fg - Fair

3. Calculate the Acceleration:

* Use Newton's Second Law of Motion: Fnet = ma, where:

* a = acceleration

Calculations:

1. Gravitational Force:

* Fg = (1.4 kg)(9.8 m/s²) = 13.72 N

2. Net Force:

* Fnet = 13.72 N - 2.5 N = 11.22 N

3. Acceleration:

* a = Fnet / m = 11.22 N / 1.4 kg = 8.01 m/s²

Answer: The acceleration of the object is approximately 8.01 m/s² downward.