Question

Anna carries a 12kg bag upstairs to a height of 15 steps amount of work she has done is?

Answer 1

Depends on the height of each step. Say each step is 0.25 m in height, then the work done will be:

Work done, W = mgh = 12 kgs X 9.8 m/(s^2) X 0.25 m X 15 steps = 441 J.