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8 July, 21:08

What is the kinetic energy of a roller coaster car that has a mass of 482kg that is descending feom the highest peak of the coaster which is known to be 75m tall and has a velocity of 37.9 m/s? The gravitational acceleration is 9.81 m/s^2. Must show all work, correct sig figs, and include correct units.

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  1. 8 July, 21:38
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    Answer: 346174.8 joules

    Explanation:

    Kinetic energy is the energy possessed by a moving object. It is measured in joules.

    Kinetic energy = 1/2 x Mass x Velocity^2

    Since mass of rollercoaster = 482kg

    velocity = 37.9 m/s

    Then, K. E = 1/2 x 482kg x (37.9 m/s) ^2

    = 0.5 x 692349.62

    = 346174.81 joules

    Thus, the kinetic energy of the descending rollercoaster is 346174.8 joules
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