Newton's third law of motion

states that when one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object

the forces two objects apply to each other

a measure of how hard it is to stop a moving object

law of conservation of momentum

states that the total momentum of a group of objects stays the same unless outside forces act on the objects

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Science- 2-4

Chapter 2-Lesson 4

Question	Answer
Newton's third law of motion	states that when one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object
force pair	the forces two objects apply to each other
momentum	a measure of how hard it is to stop a moving object
law of conservation of momentum	states that the total momentum of a group of objects stays the same unless outside forces act on the objects