Question

a useful work done by the machine

Answer 1

a is any device that helps people do work. a machine does not decrease the amount of work that is done instead a machin changes the way in which work isn't done recall that work is use force to move object..



☺☺I hope this answer is helpful to you

Answer 2

a machine is a device that helps us a lot in daily lives. Without it we can't think of our lives. Machines helps in all the ways now a days such as
giving us light in a dark night.
threshing i:-) combine harvester
windmill is used to produce electricity
they are used to navigate places. search many things and facts in the space amd on the earth .
if helped mark me as brainliest