How do machines make work easier , if they do not decrease the amount of work you need to do?

Hint: Machines do not decrease the amount of work which we need to perform but machines use to make that same work easy and simple to perform as manual force gets reduced.

Complete step by step answer:
Machines do not decrease the amount of work we need to perform. Neither machines change the work which we ought to perform but machines make the same work easy and less time consuming. We have a lot many examples in our daily life which will prove that the machines do not decrease the amount of work but do the same work efficiently and in very less time.

In earlier days farmers used to plough the field with the help of ox but nowadays tractors and various other machines are available in order to plough the field. Area to plough the field is the same even much more than earlier but the ease of doing work has changed.

Earlier carpenters used to cut the wood using saw and other manual instruments but today many wood cutting machines are available in order to reduce the time, manual force and production of efficient tasks.

Note: Cranes, JCB machines are really very helpful for industrial works which reduces the time and force as well. Mixers, blenders, hair dryers, music systems, computers, laptops, tabs, mobile phones etc are all machines and all are very helpful for domestic, official and industrial work, which are handy, reliable, easy to use and efficient.