Newton’s third law of motion describes a. action and reaction forces. b. balanced forces. c. centripetal forces. d. net force.

The correct answer is A. Action and reaction forces

Explanation:

Isaac Newton was an important English physicist, astronomer, and mathematician mainly known in the field of physics for his tree laws related to motion. In the case of the third law, this law states every action of movement implies a reaction that is expressed as an opposite force in equal magnitude that acts against the first object that is moving, for example when you push an object there with your hand is a first force you apply to the object you are pushing, but also the object applies an opposite proportional force in your hand which shows action and reaction forces. Therefore Newton's third law of motion describes action and reaction forces.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.