Final answer:
The net force acting on the squirrel as it falls from the tree is 0.5N downwards, calculated by subtracting the air friction force from the squirrel's weight.
Step-by-step explanation:
The question is asking to find the net force acting on a squirrel as it falls from a tree. The weight of the squirrel is given as 8 Newtons (N), and the force of air friction, which acts in the opposite direction to the weight, is provided as 7.5N. To calculate the net force, we subtract the air friction force from the weight:
Net Force = Weight - Air Friction Force
Net Force = 8N - 7.5N
Net Force = 0.5N
Thus, the net force acting on the falling squirrel is 0.5N downwards. This net force is responsible for the squirrel's acceleration as it continues to fall.