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7 November, 00:47

On september 8, 2004, the genesis spacecraft crashed in the utah desert because its parachute did not open. the 210-kg capsule hit the ground at 311 km/h and penetrated the soil to a depth of 81.0 cm. assume that just before the crash and in the soil the capsule moves vertically.

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  1. 7 November, 02:18
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    311km/h = 86.389 m/s

    Initial KE

    = 0.5 * 210 * 86.389^2 J

    work done by force of ground

    = F * 0.81 J

    0.5 * 210 * 86.389^2 = 0.81 F

    F = 967433.58 N

    capsule's weight W = 210 * 9.81 = 2060.1 N

    F = 469.6 times capsule weight - - - answer
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