Final answer:
The question deals with the Physics concepts of circular motion and tension, requiring calculation of the centripetal force acting on a swinging stuffed monkey held by its tail.
Step-by-step explanation:
The subject of this question is Physics, specifically relating to circular motion and tension in a rotating system. The child swings a stuffed monkey in a horizontal circle, and the problem involves calculating the maximum tension that the monkey's tail can withstand before breaking. In this scenario, tension can be thought of as the centripetal force required to keep the monkey moving in a circular path. The maximum tension (or centripetal force) that the tail can endure is given as 20 N. When an object of mass M has swung around at the end of a rope of radius R, the centripetal force F required to keep it in circular motion is given by the formula F = m * (v^2/R), where v is the velocity of the mass and R is the radius of the circle. Since the tail can only withstand a tension of 20 N, this is the maximum centripetal force available for the circular motion of the monkey.