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6. how is friction not useful
- when walking over rough surfaces
- when walking over slippery surfaces
- when walking
7. why do magnets repel or attract other magnets
- because the north end attracts the south, but reppels the north of other magnets and visa versa
- its randomised
8. what materials are magnetic
- tin, copper, titanium
- iron, steel, nickle
- gold, silver, mercuary
9. how can forces be unbalanced
- when the opposing forces are not equal
- when the opposing forces are equal
10. Name a force
- life
- dogs
- Gravitational
- a website
11. what is hookes law state?
- Issac newtons theories
- that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
- something to do with science
12. Describe how changing the core can affect the strength of an electromagnet
- it strengthens the level of magnitism
- it blows up
13. what direction do different forces act in
- diagonally
- south
- opposing directions
- same direction
14. how is friction useful
- when walking over slippery surfaces
- when walking over rough surfaces
- when walking