Final answer:
The bird's acceleration is 100 m/s².
Step-by-step explanation:
To find the bird's acceleration, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration.
In this case, the force exerted by the bird on the glass pane is 2.0 N and the mass of the bird is 20 g (0.02 kg).
So, the acceleration can be calculated as:
Acceleration = Force / Mass
Acceleration = 2.0 N / 0.02 kg
Acceleration = 100 m/s²
Therefore, the bird's acceleration is 100 m/s².