Buffy is rolling along in her 10.4 kg wagon at 3.4 m/s (in the positive direction) when she jumps off the back. She continues to move forwar

Question

Buffy is rolling along in her 10.4 kg wagon at 3.4 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.7 m/s relative to the ground. This causes her wagon to go speeding forward at 8.04 m/s relative to the ground. How much does Buffy weigh

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Sapo 5 years 2021-07-19T22:17:51+00:00 1 Answers 41 views 0

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  1. Doris
    -1
    2021-07-19T22:19:13+00:00
    Reply

    Answer:

    Buffy weigh’s 28.39 kg

    Explanation:

    Given;

    mass of Buffy and wagon, M = 10.4 kg

    final velocity of Buffy – wagon system, v = 3.4 m/s

    Buffy’s velocity relative to the ground, u₁ = 1.7 m/s

    Wagon’s velocity relative to the ground, u₂ = 8.04 m/s

    Buffy’s velocity = 1.7 – 3.4 = – 1.7 m/s

    Wagon’s velocity = 8.04 – 3.4 = 4.64 m/s

    Apply the principle of conservation of linear momentum;

    1.7 x m = 4.64 x 10.4

    where;

    m is mass of wagon

    1.7 m = 48.256

    m = 48.256 / 1.7

    m = 28.39 kg

    Therefore, Buffy weigh’s 28.39 kg

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