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Once upon a time, there lived a porcupine 

named Isaac. Isaac was a very curious 

porcupine. One day, John came to Isaac and 

warned him that the world was going to end. 

Isaac decided to go home and think of an idea 

of how to save the world. 

All of a sudden, a great idea popped into 

Isaac's head. He decided to build a catapult to 

launch everyone off the face of the Earth. First 

he needed to collect twine, sticks, and leaves. 

He gathered his friends to help him construct 

the catapult. 

They begin construction of the catapult right 

away. 

The friends got to work right away building the 

catapult. 

It took longer than expected to build the 

catapult, but Isaac and his friends 

accomplished it. They had 12 hours until the 

world was going to end. 

Isaac gathered the neighborhood at 5 A.M. to 

begin launching. He hopes his plan goes 

smoothly because he has not had time to test 

the catapult. 

The neighborhood started to wonder how the 

catapult would even work so Isaac decided to 

explain it to them. 

Isaac told the neighborhood that he created 3 

laws on how motion works. He named them 

Newton's Laws of Motion.

Newton's First Law

This means: 

*When Isaac pulls the lever down, the lever will 

be pushing back up on Isaac with the same 

amount of force which creates a balanced 

force. When an unbalanced force acts on the 

catapult, like pushing down the catapult, it 

creates motion.

Newton's Second Law

This means: 

*When the catapult launches someone, the 

animal in the catapult will be accelerated in the 

direction that the catapult is pushing that 

animal.

Newton's Third Law

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