Inertia, Motion and Forces Why are seat belts a good idea? Inertia, Motion and Forces

What forces act upon this person during a car accident?

A force is a push or a pull What is force?            A force is a push or a pull It can change the movement of an object Sometimes forces are obvious, but not always.  Do you notice the force of the floor on your feet pushing you up? Can you feel the force of the atmosphere pushing at your body?

Balanced Forces = forces that are equal in size and in opposite directions   (no movement occurs)

Unbalanced = the two forces are not equal, so that there is a movement in one direction.   Net force = the combined forces acting on an object  Examine this tug of war.  Each person can pull with exactly 1 force.   What is the force for the team on the left side?  ____ What is the force for the team on the right side?  ____ What is the net force acting on the rope?  _____

What is INERTIA? the tendency of an object in motion to remain in motion or stay still.  You're riding in a car and the driver slams on the break suddenly, what happens to your body?  

https://www.youtube.com/watch?time_continue=280&v=HRq-v4Gmzxg 1. What is the first rule of physics? 2. What would happen if you kicked the pebble in space? 3. Things like to keep on doing ___________________ 4. What is the latin word for “laziness”? ____________

Sir Issac Newton - developed the laws of motion First Law of Motion    (also known as Inertia)  - an object moving  will keep moving - if an object is at rest, it will stay at rest  - unless acted on by an unbalanced force

Jenga is a game based on inertia Jenga is a game based on inertia.  You try to move the blocks without moving the other blocks. Eventually, the tower becomes unbalanced. 

5 Inertia Activities https://www.youtube.com/watch?v=hwmf73Bwky8