Science - Friction
Angela Dobsonにより
1. Measure
1.1. Force Meter
1.2. Newtons
2. Friction good
2.1. grip
2.2. car tyres
2.3. shoes
2.4. handles
3. Little friction
3.1. ice skates
3.2. fireman pole
4. water resistance
4.1. pointy shape
4.2. to reduce friction
5. springs
5.1. push
5.2. pull
6. Magnets
6.1. 2 poles
6.1.1. north
6.1.2. south
6.2. attract
6.2.1. N - S
6.3. repel
6.3.1. N -N
6.3.2. S -S