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You ride the new rollercoast at your favorite amusement park. You start out at a height...

You ride the new rollercoast at your favorite amusement park. You start out at a height of h1=900m above the ground, descend to ground level at h2=0m, and end at a height of h3=600m. What is the speed of the rollercoast at h2 and h3? If the coaster has a mass of 350kg and travels 110m after reaching h3, what is the friction coefficient (uk)? The track is frictionless from h1-h3 and has friction after h3.
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