A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The

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A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m. What is the speed of the car at the top of the hill in meters per second

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Lệ Thu 5 years 2021-07-18T21:47:34+00:00 1 Answers 501 views 0

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  1. Thunguyet
    1
    2021-07-18T21:49:16+00:00
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    Answer:

    vf = 14 m/s

    Explanation:

    Assuming no friction losses, the change in kinetic energy will equal the change if potential energy

    ½m(vf² – vi²) = mg(hf – hi)

    ½(vf² – vi²) = g(hf – hi)

    (vf² – 0²) = 2g(hf – hi)

    vf = √(2(-9.8)(16 – 26)

    vf = 14 m/s

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