Question

explain three special cases when work done is zero . Give example also​

Answer 1

Answer:

hey dear here is ur ans---

first case-- when angle formed of 90* between the applied force and  displacement ,here work done is zero.

ex--  rotation of earth around the sun, rotation of  planets around the earth  ETC.

SECOND CASE --- when we applied force  on object and object does not displace then work done by force is called zero work..

EX-- pushing the wall. pushing the heavy object  ETC

THIRD CASE --  when object does not displace from their initial position and  there are no force applied on the body, here work done is called zero too.

Note  .. for work done is two cases should be must happen..

1)  there should be force apply on the body

2) and body should must displace from their initial position.

Explanation: