1. A 0.430kg baseball comes off a bar and goes straight up in the air. At a height of 10.0m, the baseball has a speed of 25.3m/s. Determine

Question

1. A 0.430kg baseball comes off a bar and goes straight up in the air. At a height of 10.0m, the baseball has a speed of 25.3m/s. Determine the mechanical energy at the height. Show all your work. 2. What is the baseball’s mechanical energy when it is at a height of 8.0m? Explain?

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Thu Nguyệt 3 years 2021-08-09T14:59:58+00:00 1 Answers 10 views 0

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  1. ThanhThu
    0
    2021-08-09T15:01:50+00:00
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    Answer:

    180 J

    Explanation:

    Mechanical energy = kinetic energy + potential energy

    ME = KE + PE

    ME = ½ mv² + mgh

    ME = ½ (0.430 kg) (25.3 m/s)² + (0.430 kg) (9.8 m/s²) (10.0 m)

    ME = 180 J

    Mechanical energy is conserved, so it is 180 J at all points of the trajectory.

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