Answer:
12 N
Step-by-step explanation:
The concept of this question is based on Newton's third law
This law states that:
"For every action there is a reaction that is equal in magnitude but opposite in direction"
The equation representing this law is:
F₁₂ = -F₂₁
Now, for the given problem:
We have that the ball exerted a force of 12 N on the net
Applying the above law, the net would exert a force of equal magnitude and opposite direction to that of the ball
Therefore, the net will exert a force of 12 N on the ball
Hope this helps :)