Question: While on roller blades you find yourself at the top of The Great Canadian Mine Buster. You have a mass of 75kg and you are

While on roller blades you find yourself at the top of "The Great Canadian Mine Buster". You have a mass of 75kg and you are now 56m above the ground. You start to go down the track. The first dip in the track is 5m above the ground. 3) The next peak that you come to is 40m above the ground. What is your speed going over this peak? do you do h2-h3 (51-40) or h1-h3 (56-40) in Ep = mgh?

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