Class 8 Frictions Important Questions

Class 8 Friction Important Questions 

1. What is friction?
2. Given an examples of frictions?
3. What are uses of frictions ?
4. What is lubricant?                                        
5. Explain sliding friction is less than static friction ?
6. Explain about the why objects moving in fluids must have special shapes ?
7. What is rolling frictions ?
8. What is sliding frictions ?
9. Given an examples of sliding in frictions ?
10. Given an examples of rolling frictions ?
11. How can you reduce the frictions ?
12. Is it  speed affect of  frictions ?
13. What are they 4 ways increase the frictions

14.  What are factors affecting frictions ?

15. Is the  frictions the same for all the surface ?

16. why is it difficult to walk on a smooth and wet floor ?

17. when  you strike a match stick against the rough surface , it catches fire why ? what is reason ?