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Questions and Answers
What is the purpose of treaded soles on shoes and tires?
What is the purpose of treaded soles on shoes and tires?
- To increase friction (correct)
- To improve aerodynamics
- To reduce friction
- To eliminate friction
Why do kabaddi players rub their hands with soil?
Why do kabaddi players rub their hands with soil?
- To increase the smoothness of the skin
- To improve grip by increasing friction (correct)
- To reduce friction with opponents
- To eliminate friction completely
What effect does adding powder to a carrom board have on friction?
What effect does adding powder to a carrom board have on friction?
- Increases friction
- Decreases friction (correct)
- Causes no change in friction
- Eliminates friction
Why is it not advisable to use oil as a lubricant in some machines?
Why is it not advisable to use oil as a lubricant in some machines?
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How does the application of oil, grease, or graphite between moving machine parts reduce friction?
How does the application of oil, grease, or graphite between moving machine parts reduce friction?
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Can friction be entirely eliminated by polishing surfaces?
Can friction be entirely eliminated by polishing surfaces?
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