Consider an experiment where a subject lands during two conditions from a height

Question

Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion). During the second landing condition, the subject lands 'softly' (e.g., lots of knee flexion). During the soft landing, the peak vertical forces are less than during the stiff landing. Which of the following statements best explains this observation? A. The length of time a force is applied is increased during the soft landing compared to the stiff landing. B. The momentum at impact is less during the soft vs. stiff landing conditions. C. The acceleration of the subject would be greater during the soft landing compared to the stiff landing. D. The impact velocity would be greater for the stiff compared to the soft landing.

Explanation / Answer

A is the correct answer.

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