7. A 50 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is over the bar is 1.0 m/s. Neglect air resistance, as wel

Question

7. A 50 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is over the bar is 1.0 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her height as she crosses the bar.

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Nem 3 years 2021-08-19T04:09:01+00:00 2 Answers 104 views 0

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  1. kimchi2
    0
    2021-08-19T04:10:24+00:00
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    Answer:

    5.1 m

    Explanation:

    Initial kinetic energy = final kinetic energy + final potential energy

    KE = KE + PE

    ½ mv² = ½ mv² + mgh

    ½ v² = ½ v² + gh

    ½ (10 m/s)² = ½ (1.0 m/s)² + (9.8 m/s²) h

    h = 5.1 m

  2. King
    0
    2021-08-19T04:10:46+00:00
    Reply

    Answer:  5.05 m

    Explanation:

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