When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landin

Question

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 73.0 kg man just before contact with the ground has a speed of 6.46 m/s. In a stiff-legged landing he comes to a halt in 2.07 ms. Calculate the average net force that acts on him during this time

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Xavia 4 years 2021-08-31T18:47:31+00:00 1 Answers 7 views 0

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  1. Ladonna
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    2021-08-31T18:48:44+00:00
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    Answer:

    Explanation:

    The man comes to halt due to reaction force acting on him in opposite direction . If R be the reaction force

    impulse by net  force = change in momentum

    Net force = R – mg , mg is weight of the man .

    ( R-mg ) x 2. 07 x 10⁻³ = 73 x 6.46 – 0

    R – mg = 227.81 x 10³

    Average net force = 227.81 x 10³ N .

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