can someone please help me? PLEASE?

Question

At a playground, an 15 kg child plays on a slide that drops through a height of 2.4 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -211.7 J on the child. What is the child's speed at the bottom the slide? this is an energy problem by the way.

Answer 1

Setting up KE=Delta PE-Friction work
.5*m*v^2=m*g*h-211.7

v=sqrt(2*(9.81*2.4-211.7/15))
v=4.34 m/s

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