Newton's third law states the forces exerted on two interacting objects are equal in magnitude and:

1. The third law is about a pair of forces. 2. Interactions between any two objects are described by Newton's third law. 3. The forces exerted on these objects are equal in magnitude. 4. They are opposite in direction to each other. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_