do this as consrevation of energy
Initial spring energy=workdoneFriction+PE gain at top
1/2 k x^2=60*2.5+mass*g*height solve for height
A girl is sitting on a sled. She is pushed by a spring that was compressed 0.8m. The spring constant is 2500 N/m. After moving 2.5 m across a surface that applies 60 n of friction, the girl and the sled slid up a frictionless hill. The mass of both the sled and the girl is 27kg. How high do the girl and the sled rise up by the time they stop?
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