# physical science

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A 30.0kg child standing from rest slides down a water slide with a vertical height of 10.0m. What is the childs speed (a)halfway down he slides vertical distance and (b)three-fourths of the way down? (Neglect friction?

• physical science -

ΔPE=KE
mgΔh=mv²/2
v=sqrt(2gΔh)
(a) Δh=5 m,
(b) Δh=7.5 m.

• physical science -

34.5

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