Friction-Important Questions

1.   Write some harms of friction.
2.   What is sliding friction?
3.   Why we fall down when we stop on banana peel?
4.   In which direction frictional force acts on a moving object.
5.   What is easier- rolling or sliding?
6.   What is drag?
7.   Hoes does the friction get affected by the nature of surface?
8.   What happens, if the floor we walk on is friction less?
9.   The sole of shoes get worn after some time. Explain why?
10.   What happens when there is no friction between the chalk and the blackboard.
11.   Write on harm of friction.
12.   Why do kabaddi players rub their hands with soil?