1. The problem statement, all variables and given/known data In climbing stairs that are 10.0 m high, how much work does a person weighing 60.0 kg do? 2. Relevant equations W = Fd 3. The attempt at a solution I know that when moving upwards, and when there is no change of kinetic energy from start to finish, the work done is W = mgh. In this case, the answer to the problem would be 5880 J. However, I am not sure this is correct, for it only takes into account the vertical direction. Doesn't the person exert a force through a distance (and thus do work) when he or she is moving in the horizontal direction between each step on the stairs?