# phycis

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A roller coaster has two hills and starts from rest atop the first hill , which is the higher of the two hills . The secound hill increases if the height of the initial hill is increased by 20m

• phycis -

Your question makes no sense to me.

• phycis -

The roller coaster can not make it to the top of the second hill if the first hill is not higher.
(1/2) m v^2 + m g h = constant

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