4 +) 1/2 points n Poul Stapp was a U.S. Air Force officer who studied the effect

Question

4 +) 1/2 points n Poul Stapp was a U.S. Air Force officer who studied the effects of extreme deceleration on the human body. On De My Notes AskY , Stapp rode a rocket sled, accelerating from rest to a top spe 9.80 m/s?) by taking its ratio to the acc 282 m/s (1015 km/h) in 5.00 s, and was broug of gravity ht jarringly back t o rest in only 1.40 s! Calculate his acceleration and deceleration. Express each in multiples of g ( (a) acceleration 76 (b) deceleration (Enter the magnitude.) Additional Materials il Reading Submit Aniswer Save Progress points My Notes Ask Your Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from 9.6 km/s to-18.6 km/s over a period of 195 years. n of your answer m/s (b) What is the asteroid's average acceleration during this interval? (Indicate the direction with the sign of your answer.) m/s Additional Materials Reading

Explanation / Answer

B)

282/(1.4 x 9.8) = 20.55 g

Problem 2)

A)

Change in velocity = Vf - Vi = -18.6 - 19.6 = -38.2 km/s

B)

Average acceleration = change in velocity/time in sec

= -38.2 /(1.95 x 365 x 24 x 3600) = 6.21 km/s^2

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