# Physics

On a roller coaster ride the cart is 250 kg. Initially, the cart is traveling at 5 m/s at the upper level, and then 25 once it reaches the flat lower level that is 8 m off the ground. How high up is the upper level?

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1. initial pe+initial ke=final pe+final ke
mgh+1/2 m5^2=mg8+1/2 m 25^2

solve for h

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