Q.1. Why do kabaddi players rub their hands with dry soil?
Q.2. When does sliding friction come into play?
Q.3. What is done to increase friction between the tyres and road?
Q.4. Name the force responsible for wearing out car tyres.
Q.5. Explain why sportsmen use shoes with spikes.
Q.6. Can we reduce friction to zero by polishing surfaces or using a large amount of lubricants?
Q.7. What is rolling friction?
Q.8. Why do tyres of cars wear out gradually?
Q.9. Explain why the sliding friction is less than the static friction.
Q.10. When we strike a matchstick against the rough surface, it catches fire. Give reason.
Q.11. What is a spring balance?
Q.12. Why do car wheels often spin on icy roads?
Q.13. Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Q.14. You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?
Q.15. Why will a pencil write on paper, but not on a glass?
You can find Worksheets Solutions here: Worksheet Solutions: Friction
91 videos|273 docs|44 tests
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1. What is friction and how does it work? |
2. What are the different types of friction? |
3. How can friction be both beneficial and detrimental? |
4. Can friction be reduced or eliminated? |
5. How does friction affect the speed and distance traveled by an object? |
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