Day 4: 1st Law

FQ:  How does Newton's First Law relate inertia to forces?

1.  Demo:  Force on a bowling ball vs. force on a box 

2. Watch about N1L

Some great examples of inertia at work in this X-posted video.

Learn about Newton's 1st Law of Motion in this Professor Dave video: 

Want to see how Newton's 1st Law applies to football players? Watch here. 

Want to see how Newton's 1st Law applies to car crashes?  Watch here.

Want a song about Newton's 1st Law?  Watch here.

Want to know why inertia is the same thing as "laziness"?  Watch here.

3. Read about N1L

Newton’s 1st Law of Motion: An object at rest will stay at rest, and an object in motion will stay in motion UNLESS acted on by an unbalanced force

• In other words: an object will keep doing what it’s doing until a force changes its motion

If an object is not accelerating (= moving at constant velocity, which COULD be zero), either:

1. no forces are acting on it, or
2. all the forces on it are balanced (they have equal sizes but opposite directions)

4. Mini-Lab:  Friction

Complete the following investigation to help you understand how friction affects the motion of objects.

Click this link: https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html 

Next, click the FRICTION image: 

The screen should look like this:

Click "Take the Quiz" to get started!

5.  Project:  Answer question #5 about friction in your sport.