wieyPU Cutnell, Physics, 10e Chapter 07, Problem FI Your ans wer is partialv cor

Question

wieyPU Cutnell, Physics, 10e Chapter 07, Problem FI Your ans wer is partialv correct. Try again. Find Whan jumping straiphe down, you can be soaualy injured i you land stsfr-legged, One way to aveid injury i to bend your kness upcn laning to rsduce the farce of the impact A 85. ko man Suut befone contact with the ground hasa speed of5.00 m/s. (a) En astiff-lgged landing he comes toahait in 4.20 the magnitude gf the 39e ape et force that 8 ts on him during this time b when he bends h 5 knees he comes to halt " 199 5 Find the ag itude of the average et orce r w Du ng the la ding the force o the yound on the m an ports upwar, while the orce due to ra ty pores do w The average net force acting on the man inch desboth of these forces. Taking ito account the directions ofhe forces find th magnitude of tha force appied by the ground on the man in Dart (b). Click if you woeld lke to Show Work for this question: nShork Question Attem pts3 used SAVE FOR LATO

Explanation / Answer

Part a

F = ma

F = m[ (v - u) / t ]

F = {(85.3 kg)*(5.9 m/s)}/(0.00429 s)

Fa = 117312.35 N

Part b

F = m[ (v - u) / t ]

F = {(85.3 kg)*(5.9 m/s)}/(0.199 s)

Fb = 2529 N

Part c

The force of gravity = mg

Fg = 85.3 kg*9.81 m/s2

Fg = 836.793 newtons.

Ff = Fb +Fg

Ff = 3365.8 N

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