2. Purpose Students will learn about Newton's Laws. Students will perform hands-on activities related to Newton's Laws.

3. 1. Meet Sir Isaac Newton  Sir Isaac Newton is an important scientist who merged math and science things move in our world  He developed theories which explain how and why things move in our world Born: 4 Jan 1643 in Woolsthorpe, Lincolnshire, England Died: 31 March 1727 in London, England

4. Explore Newton's First Law - The Law of Inertia  Let’s look at Newton's First Law An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted on by an unbalanced force. Your body keeps wanting to move forward, even though the car stops! If you were not wearing a seatbelt and you were traveling very fast, your body could continue to move forward through the windshield!  This property of matter is called inertia. ???

5. Examples of Newton’s First Law  This next picture shows how Newton's First Law applies to moving vehicles. Watch the ladder to see what happens to objects in motion. ???

6. Examples of Newton’s First Law  Let’s look at a hammer falling on the floor. When the hammer falls, the head keeps traveling toward the ground even after it hits. What happened? What part of Newton’s 1 st law do we see in the hammer?

7. Newton’s 2 nd Law  We won’t spend a lot of time with this,but it’s nice to get to know Newton’s second law: The force of an object is equal to its mass times its acceleration Ever wonder why coaches tell you to put your weight into it? An inexperienced person, using just his hand (mass of.7kg), might exert 35 N of force. A karate sensei (master) will be able to use his entire body's mass (70kg) in breaking bricks. The 3500 N of force he would use could easily break several bricks ! Well, a karate master can exert a tremendous force to break boards and bricks. Mass: The amount of matter in an object Acceleration: How quickly an object increases speed

8. Newton’s 2 nd Law (continued)  Here are a few more examples: You’ve heard that Superman is faster than a speeding bullet. Both have a relatively small mass (compared to the world around them) but have incredibly fast acceleration. They exert A LOT of force A slow moving train has very little acceleration, but has a huge mass! It exerts A LOT of force, too!

9. Explore Newton's Third Law - The Law of Interaction  Read about Newton's Third Law: For every action there is an equal and opposite reaction.  Actions are also called “forces” What do you do to make an object move?  Think of a force as a push or a pull  Forces can be big or small

10. Examples of Newton’s Third Law What happened?

11. What forces affect motion?  Friction Friction is a force acts between surfaces of objects that touch. It is usually what slows down moving objects Will a basketball bounce forever if you don’t touch it? What makes it stop?

12. Let’s explore friction!  How could you decrease friction when moving a heavy box across a gravel driveway?  How could you increase friction on an icy surface?

13. Other Great Websites about Newton’ Laws  For information about Newton’s Laws: http://www.usoe.k12.ut.us/curr/science/sciber0 0/8th/forces/sciber/newtons.htm  For information about Sir Isaac Newton: http://www.newton.cam.ac.uk/newtlife.html