Question

what is the work done by a man in carrying a suitcase weighing 30 kg over his head , when he travels a distance of 10 m in (i) vertical and (ii) horizontal direction s?

Answer 1

if you're asking about the work done by the man on the suitcase, i.e., what is the work done ON THE SUITCASE, then it will be zero(0).

the reason is simple! the man and suitcase are in contact with each other!
so
w=F×S

→S will be 0 as the displacement of suitcase with respect to man is always zero.

hence,

W=0