posted by Fallon .
A child who has a mass of 17 kg slides down a slide from a height of 3.3 m. If friction does a non-conservative work of -143 J, what is the speed (in m/s) of the child at the bottom of the slide? The acceleration due to gravity is 9.81 m/s2
final KE= initialPE-frictionenergy
1/2 m vf^2=m g 3.3 - 143