Friction Flashcards
1
Q
What is friction’s relationship with motion?
A
Friction always opposes motion.
2
Q
How can friction be helpful?
A
E.g. brakes, walking, any moving thing
3
Q
How can friction be unhelpful?
A
E.g. air resistance, ice skating
4
Q
What are the key features of the ideal streamlined shape?
A
- rounded front
- slowly tapering tail
- smooth shape with no projections
5
Q
How can you reduce friction?
A
- lubrication
- streamlining
