Force
Objects need force to stay or move.
What is first law of motion? What is inertia?
When two people run into each other and fall backwards.
What is an example of the third law of motion? What is an example of action and reaction?
If one force acts on an object, an opposite force will push back.
What is third law of motion? What is action and reaction?
A soccer ball slows down on the grass.
What is inertia? What is an example of the first law of motion?
Forces can slow down, speed up, or change direction of an object.
What is the second law of motion? What is acceleration?