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# Newton’s laws of motion

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### Transcript

• 1. Newton’sLaws of Motion
By Ricky Lopez
• 2. Newton’s First Law of Motion
Newton’s first Law of Motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted on by an unbalanced force.
Also known as the Law of inertia
• 3. Newton’s 1stLaw Example
Before
During/After
• 4. Explanation
This SpongeBob cartoon is a great example of what happens when a force is applied to an object at rest. Squid ward is stopped at a red-light and no longer in motion. SpongeBob comes traveling at a great force due to the weight of the boat and acceleration. The force of the collision between the two boats causes Squid ward to fly out of the boat in motion and will continue to do so until another force stops him.
• 5. Newton’s 1st Law Example
Before
During/After
Pictures provided by Ricky
• 6. Explanation
In the example, a ball is left at rest. It isn’t until a force is applied that the basketball begins to move. If no other force is applied, the ball will continue to move because there is no friction.
• 7. Newton’s 2nd Law of Motion
Newton’s 2nd law states that the acceleration of an object is dependent upon two variables – the net force acting upon the object and the mass of the object
• 8. Newton’s 2nd Law Example
Before
During/After
• 9. Explanation
In order for a person to cut their lawn, they must apply force. The engine of the lawn mower already provides a force. It is called thrust force due to the mass and acceleration of the blade. However, that force alone won’t cut the lawn. You still need to apply the necessary force to the lawn mower in order to move it. Your end result is a mowed lawn considering your not to lazy and stop.
• 10. Newton’s 2nd Law Example
Before
During/After
• 11. Explanation
In order for tennis players to win their games, they need to hit the tennis ball with enough force. If the force they hit the ball doesn’t go over the net, then they are penalized. The greater the force means the greater the acceleration. The tennis players need to make sure that they can hit the ball at good force to continue the game.
• 12. Newton’s 3rd Law of Motion
Newton’s 3rd Law of Motion states that for every action, there is an equal and opposite reaction
• 13. Newton’s 3rd Law Example
Before
During/After
• 14. Explanation
A person jumping through the air is an example of Newton’s 3rd law. In order for a person to jump through the air, the person needs to exert a force on the ground or surface. There has to be an opposite reaction, which means the ground is also going to exert a force on the person. Without an opposite reaction, people wouldn’t be able to walk, run, or jump. The equal and opposite forces is what makes this possible.
• 15. Newton’s 3rd Law Example
Before
During/After
• 16. Explanation
Swimming is another example of Newton’s 3rd Law. In order for swimming to happen, the swimmer must exert a force in the direction he or she wants to go. They must cycle their arms up and down for them to go in that direction. As they are exerting that force and swimming through the water, the water is also exerting a force in the opposite direction, away from the swimmers. That is the opposite reaction and allows the swimmers to proceed in their direction.