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### Interaction Pairs - The bar holds the man - The man pulls on the bar ### Force Diagrams - Size of arrow=size of force - Label with number of (N) ### Diagram of Skateboard 10N 25N ### Diagram of Plane 200N 200N Thrust Air Resistance ### Challenges: 1. A force is a push or pull. There...

### Interaction Pairs - The bar holds the man - The man pulls on the bar ### Force Diagrams - Size of arrow=size of force - Label with number of (N) ### Diagram of Skateboard 10N 25N ### Diagram of Plane 200N 200N Thrust Air Resistance ### Challenges: 1. A force is a push or pull. There are 2 types of forces: contact & non-contact. 2. You measure forces in Newtons (N) with a Newton meter. 3. An interaction pair is a pair of 2 forces that act against each other (eg Thrust and friction or Air Resistance & Gravity). ### Stretch Your Body First the ball - The air (bow) Force (B) - 30N Gravity