You have a 750-kg roller coaster that starts from rest at a height of 37.5m above the ground. The total length of a particular segment of track is 42.0 m and ends 10.0 m above the ground. If friction is negligible, what is the roller coaster’s speed at the end of this segment? If the average force of friction is 725.0 N, what is the roller coaster’s speed at the end of this segment? How much energy is lost?

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