the roller coaster has KE at the top along with PE from the height
after descent, it has KE
KEtop + PEdrop = KEbottom + friction loss
A roller coaster with a mass of 500.0 kg starts from a height of 27.0 meters with a speed of 5.1 m/s. It descends to a height of 2.00 meters before it starts back up. Some energy is loss to the work due to friction. The speed at the bottom of the ramp is 22.0 m/s. How much energy was lost to friction?
I'm not sure how to find friction with the information provided.
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