Read through the and calculate the predicted change in kinetic energy of the oblect compared to 50 kg ball traveling at 10 m/s . 50 kg ball

Question

Read through the and calculate the predicted change in kinetic energy of the oblect compared to 50 kg ball traveling at 10 m/s . 50 kg ball traveling at 20 n / s would havekinetic energy 50 kg traveling at 5 m/s would have energy 50 kg person falling at 10 m/s would havekinetic energy

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Calantha 3 years 2021-08-23T16:05:33+00:00 1 Answers 20 views 0

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    2021-08-23T16:06:58+00:00

    Answer:

    7500 J

    -2475 J

    0 J

    Explanation:

    Kinetic energy, KE is given by 0.5mv^{2} where m is the mass of an object and v is the velocity.

    Change in kinetic energy is calculated by \triangle KE=0.5m(v_f^{2}-v_i^{2})

    First case

    We compare 50 kg travelling at 10 m/s to 50 kg at 20 m/s

    \triangle KE=0.5*50(20^{2}-10^{2})=7500 J

    Second case

    We compare 50 kg travelling at 10 m/s to 50 kg at 5 m/s

    \triangle KE=0.5*50(5^{2}-10^{2})=-2475 J

    Third case

    We compare 50 kg travelling at 10 m/s to 50 kg at 10 m/s

    \triangle KE=0.5*50(10^{2}-10^{2})=0 J

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