Question

4. How is a machine taken care of in the following cases?
(a) The axle of pulley fixed on a well may not wear out.
(b) The handle of a bicycle may not rust
(C) Delicate machines of the factory may not be spoiled due to wear and tear.
5. Name the class of lever used in a wheel barrow.
6. To which class of lever does a fishing rod belong?
7. Which class of lever has a mechanical advantage greater than one?
8. Can effort be greater than load in a machine?
9. Name a simple machine consisting of two inclined planes.
10. Due to which force does the wear and tear of machine parts occur?
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Answer 1

ans take care of machine some of the way in which machine should be kept for are given below

1 machine should be kept in a clean environment which is free from duct and moisture

2 when not in use machines should kept cover to prevent collection of dust on them

Answer 2

Answer:

the axle on pulley fixed on a well may not wear out