....o AT&T; LTE 11:38 AM session masteringphysics.com T 175% Exercise 5.17: Gene

Question

....o AT&T; LTE 11:38 AM session masteringphysics.com T 175% Exercise 5.17: Genesis Crash Mastering Physics Exercise 5.17: Genesis Crash 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 3II km/h and penetrated the soil to a depth of 8l.0 cm. Part A Assuming it to be constant, what was its acceleration (in m/s during the crash? a 606.719 m/s Give Up Submit incorrect; Try Again; 19 attempts remaining Part B Assuming it to be constant, what was its acceleration (in g 's) during the crash? a E Submit Give Up Part C

Explanation / Answer

here,

mass of capsule , m = 210 kg

initial speed , u = 311 km/h = 86.39 m/s

depth , d = 81 cm = 0.81 m

A)

the accelration be a

v^2 - u^2 = 2 * a * s

0 - 86.39^2 = 2 * a * 0.81

a = 4606.8 m/s^2

B)

a = 4606.8 /9.81 g = 469.6 g

C)

the force exerted , F = m * a

F = 9.67 * 10^5 N

D)

F/W = 967428 /(210 * 9.81) = 469.6

F)

let the time taken be t

v = u + a * t

0 = 86.39 - 4606.8 * t

t = 1.87 * 10^-2 s

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