Friction-Sample Questions

1.   Does friction depend on the nature of objects?
2.   Which type of surface produces more friction?
3.   Which type of surface produces less friction?
4.   Which is less sliding friction or static friction?
5.   Why is it difficult to move on a wet marble floor?
6.   What would happen when an object starts moving if there is no friction?
7.   Give two examples where friction is undesirable?
8.   Our hands become warm when we rub them. Why?
9.   Why do we shape aero planes like that of bird?
10.   Write some methods to reduce friction?
11.   Write various types of friction.
12.   What is a fluid friction? Write the factors on which fluid friction depends.