A 29.6 kg child slides 4.38 m down along the slope of a green playground slide, experiencing a constant friction force of 53.7 N. The change in height of the child is 0.435 m. The local gravity at this playground is g=9.83 m/s2. What is the work done by gravity on the child?
I know the answer is 127 J, I just don't know how to reach that answer.
