Question

In the following cases, whether work is done or not ? (1)A student reads a book. (2) The revolution of earth around the sun

Answer 1

ACCORDING TO ME WORK IS NOT DONE IN BOTH THE CASES

SINCE,

IN THE FIRST CASE THERE IS NO DISPLACEMENT OR CHANGE IN POSITION

OF COURSE HE IS DOING MENTAL WORK BUT THERE IS NO PHYSICAL WORK DONE.SO NO WORK IS DONE

IN THE SECOND CASE, THERE IS  CHANGE IN POSITION BUT AS YOU KNOW THAT EARTH COMES BACK TO THE SAME POSITION WHERE IT WAS BEFORE.THEREFORE HERE DISPLACEMENT IS 0.SO,NO WORK IS DONE.

PL MARK THIS AS THE BRAINLIEST