Learning Intentions:
- Label forces correctly on diagrams according to Newton's Laws
- Apply Newton's Laws of Motion to everyday examples
Look at the forces demonstrations set up around the classroom:
Mass on a spring, add more mass, what happens?
Flat paper, scrunched up paper - drop them.
Car rolling down a slope, when does it start to roll?
Compress the trolley and let it shoot off, what does it do and why?
Why do the magnets float
How does the scale measure your weight?
Questions:
What can forces do to things?
What is the best-known force?
What is the unit of measurement of force?
What force does a skateboarder rely on to stay on the board?
How does Emma the skateboarder maximise friction between her and the board?
Where is friction NOT a good thing for a skateboarder?
Why does Emma put wax on the ‘grind’ bar?
How fast does a skydiver travel in free fall?
Look at the skydivers in free fall. Why does it look like they are just floating?
What does the force of air resistance do to the skydiver?
What does a parachute do, increase or decrease air resistance?
Which part of the parachute has the effect of slowing the parachutist down?
What parts of our bodies can we use to exert forces on things
What is the stringy bit called that attaches the muscle to the bone?
When a sledge is accelerating down a slope, which force is greater, gravity or friction?
How do skiers and sledgers overcome the force of gravity to have another go?