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Describe the coefficient of friction ( µ ) between some common materials?
Coefficient of friction ( µ )between some common materials:
Materials | µs |
Glass and Glass | 0.9 |
Glass and Metal | 0.5 – 0.7 |
Ice and Wood | 0.05 |
Iron and Iron | 1.0 |
Rubber and Concrete | 0.6 |
Steel and Steel | 0.8 |
Tyre and Road, dry | 1 |
Tyre and Road, wet | 0.2 |
Wood and Wood | 0.25 – 0.6 |
Wood and Metal | 0.2 – 0.6 |
Wood and Concrete | 0.62 |
1. Which shoes offer less friction?
Ans: The smooth surface shoe offers less friction.
2. Which shoe is better for walking on a dry track?
Ans: The smooth surface shoe is better for walking on a dry track.
3. Which shoes are better for jogging?
Ans: The rough surface shoe is better for jogging.
4. Which sole will wear out early?
Ans: The smooth surface sole will wear out early.