Motion

 

L a w s  o f   Motion

1  Isaac Newton 

1. He came up with three Laws of Motion to describe how things move scientifically. He also described how gravity works, which is an important force that affects everything.
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3. A force is anything that can change the state of motion of an object, like a push or a pull. 
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5. You use force when you push a letter on the computer keyboard or when you kick a ball. Forces are everywhere.
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7.  Gravity acts as a constant force on your body, keeping you secure on planet Earth so you don't float away.

First Law of Motion

1. Newton's first law says that any object in motion will continue to move in the same direction and speed unless forces act on it.
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3. That means if you kick a ball it will fly forever unless some sort of forces act on it! As strange as this may sound, it's true. 
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5. When you kick a ball, forces start to act on it immediately. These include resistance or friction from the air and gravity. 
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7. Gravity pulls the ball down to the ground and the air resistance slows it down.

Second Law of Motion

1. His second law states that the greater the mass of an object, the more force it will take to accelerate the object. 
2. There is even an equation that says Force = mass x acceleration or F=ma.
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6. This also means that the harder you kick a ball the farther it will go. 
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8. This seems obvious to us, but having an equation to figure out the maths and science is very helpful to scientists.