Write the answer to the given question in your own words :
What is meant by simple machines ?

Explanation

The maintenance of the machines is done in the following ways :(1) All the parts a machine are wiped clean. (2) Oil and other lubricants are applied between the parts that may have friction. This reduces wear and tear of the machines. (3) Machines are kept covered so that the dust does not settle on them. (4) Metallic parts of the machine are painted externally so that they don.t catch rust. (5) Machines are always kept dry.