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# Three Laws Of Motion

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### Three Laws Of Motion

1. 1. Sir Isaac Newton’s Laws Three Laws of Motion
2. 2. Newton’s First Law of Motion <ul><li>Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. </li></ul>
3. 3. For example:
4. 4. <ul><li>A boy stopping ball #1 or kicking ball #2 would be an outside force. </li></ul>Outside Force:
5. 5. Newton’s Second Law of Motion <ul><li>The relationship between an object's mass m , its acceleration a , and the applied force F is F = m a . Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector. </li></ul>
6. 6. For Example: <ul><li>A ball is in motion and it has a certain velocity (speed/acceleration) that it will maintain. </li></ul>The ball’s velocity will change if acted upon by an outside force.
7. 7. If the surface the ball is rolling on were to slant, the ball’s velocity would change and the ball would move faster. The slant would be considered the outside force.
8. 8. Newton’s Third Law of Motion <ul><li>For every action there is an equal and opposite reaction. </li></ul>
9. 9. For Example: <ul><li>Imagine you are riding a skateboard… </li></ul>
10. 10. Now imagine that you are not very good at riding the skateboard and you fall forward…
11. 11. According to Newton’s Third Law, as you fall in one direction, there is an opposite reaction occurring in the other direction. <ul><li>Basically, as you fall forward, the skateboard will move in the other direction. </li></ul>
12. 12. Paving the Way <ul><li>Sir Isaac Newton’s studies helped pave the way for further studies of objects at rest and in motion. </li></ul><ul><li>His ideas help us to better understand the reactions that occur to an objects state of rest or motion when acted upon by an outside force. </li></ul>