1. Law of Inertia 8.P.2A.3 Construct explanation for the relationship between the mass of an object and the concept of inertia (Newton’s First Law of Motion

2. Newton’s First Law of Motion  Object at rest will stay at rest…  Object in motion will stay in motion…  Unless External Forces are applied

3. Inertia  Inertia is the tendency of the motion of an object to remain constant in terms of both speed and direction  Amount of inertia that an object has depends on the object’s mass. The more mass an object has, the more inertia  Large Mass = More Inertia  Hard to slow down  Hard to stop  Hard start  Hard to Speed Up  Hard to change direction

4. Momentum  The Moving Force of a body that is in motion  P=mv  Momentum= Mass x Velocity (speed and direction)

5. Warm Up 9/4  Find your new seat.  5 things you’ve learned this week in science about science.

6. Lab  Objective: How does mass affect inertia?  Materials: Meter stick  Hypothesis: Who in the group will need more distance to stop?  Directions: You will have a group of 4-5  Each group member will run at full speed at 10m 3x  Record the number of meters each participant runs past the 10 m mark.  From the front of the chair to the front of the foot furthest away from the chair  You should run as fast as you can  Analyze your data: Who stopped the farthest away from the chair, Who stopped closest, any other questions you or other people may have about the experiment… Was your hypothesis correct? Why or why not?  Conclusion: What could have made you stop quicker, what was the environment like, etc.