1. Do Now Heading: Newton’s 3rd Law
Pick up worksheets from the front table
Turn in the lab if you did not yesterday
Copy the heading into your table of contents
Copy the homework into your homework log

2. The Rock Slide
Two big rocks are rolling towards Hoover High. Rock A has a mass of 15 kg and is rolling with a velocity of v = 20 m/s. Rock B has a mass of 20 kg, and is rolling with a velocity of v = 15 m/s.
Which rock do you think would be harder to stop before it hits the school?
Answer with at least 3 complete sentences and a drawing to help support your claim.

3. Today’s Vocabulary
INERTIA

4. So what happens when you are trying to stop this boulder?

5. Newton’s 3rd Law
For every action, there is an equal and opposite reaction.
Every time you exert a force on an object, it exerts a force back on you!

6. Solving for Normal Force in a Balanced System
A box is sitting at rest on a table
We first need to identify all of the forces acting on the box
Then we need to draw the FBD with all of the forces acting on the box
We need to determine if this is a balanced or unbalanced system
Solve for the Normal Force

7. Solving for Normal Force in a Balanced System
A 2 kg ball is dropped into your hand. The ball is accelerating downward at 1 m/s2 .
We first need to identify all of the forces acting on the box
Then we need to draw the FBD with all of the forces acting on the box
We need to determine if this is a balanced or unbalanced system
Solve for the Normal Force