Question

Is work done when ant sits on the back of a mice and the mice carries the ant for a distance of 10m

Answer 1

WORKDONE DOESNOT HAPPENS ON THE ANT SINCE IT DOESNOT HAVE ANY DISPLACEMENT WHILE IT SIT ON THE BACK OF THE MICE SO
      W=F*S
        =F*0  [S=0]
       =0

Answer 2

Force should be accent on the object or the object must be displaced.
 These are the two conditions for work said to be done.
In this case , only the mice is doing the work,
work of the ant is , W=F*S
                              W=0