Question

A man weighing 80kg climbs a staircase carrying s 20kg load. the staircase has 40step s, each of 25cm height. if he takes 20 seconds to climb, the work done is

Answer 1

hsy and the kids will have it on this one in the same time I have attached the an hour of the month of April at this time around the same as last year in the past few weeks ago in the past few years weeks to and fro including a few months back on track down the stairs in your life and with my name in a couple