04. Forces and Newton's Laws

LEARNING TARGETS

• • State the definition of a ‘force’.

  • Distinguish between balanced and unbalanced forces.

  • Force is a vector (quantity + direction).  Forces in the same direction can be combined.  Describe how Team A could ‘win’ a tug of war match against Team B.

  • Explain why a skateboarder cannot glide forever down a road without pushing along.

  • Describe Newton's Laws of Motion

  • Be able to solve word problems involving Newton's Laws of Motions

  • Solve free body diagrams and use them to calculate resultant (net) forces

ACTIVITY - FORCES CIRCUS!!!

Look at the forces demonstrations set up around the classroom:

1. Mass on a spring, add more mass, what happens?

2. Flat paper, scrunched up paper - drop them.

3. Car rolling down a slope, when does it start to roll?

4. Compress the trolley and let it shoot off, what does it do and why?

5. Why do the magnets float

6. How does the scale measure your weight?

WATCH THIS VIDEO AND COMPLETE THE WORKSHEET BELOW

FREE BODY FORCE DIAGRAMS