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what i'm looking for is 1. the total energy of the sphere, and 2. the height of the ball after it has traveled up the incline.

i have some questions however. First, i understand that total energy = KE+PE. looking at the solution, KE=1/2mv^2. why does PE=1/1*Iw^2? this is the first time i've ever seen PE defined as such an equation.

in the second part of the solution, they use mgh - why isn't mgh used in the first solution? thanks

what i'm looking for is 1. the total energy of the sphere, and 2. the height of the ball after it has traveled up the incline.

i have some questions however. First, i understand that total energy = KE+PE. looking at the solution, KE=1/2mv^2. why does PE=1/1*Iw^2? this is the first time i've ever seen PE defined as such an equation.

in the second part of the solution, they use mgh - why isn't mgh used in the first solution? thanks

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