8. A 27-kg child, starting from rest, slides down a playground slide from a height of 3.0 m and arrives at the ground travelling at 3.1 m/s. a) Determine the total mechanical energy available at the beginning? b) Consider the energy transformation, what percent of her initial energy was lost due to friction on the way down the slide?

8. A 27-kg child, starting from rest, slides down a playground slide from a height of 3.0 m and arrives at the ground travelling at 3.1 m/s. a) Determine the total mechanical energy available at the beginning? b) Consider the energy transformation, what percent of her initial energy was lost due to friction on the way down the slide?