Question

a porter lifts a suitcase weighing 20kg from the platform and put it on his head 2.0m above the platform. work done by the porter on the suitcase is​

Answer 1

Answer:

zero..................

Answer 2

Answer:

Calculate the work done by the porter on the suticase. =-(20kg)(9.8ms2)(2m)=-392J. The work done by the porter is 392 J =390 J.

Explanation:

hope this will help u

make me as a brainliest