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Dr. John Paul Stapp was U. S. Air Force officer who studied the effects of extreme deceleration on the human body. On December 10, 1954, Stapp rode a rocket sled, accelerating from rest to a top speed of 282 m/s (1015 km/h) in 5.00 s, and was brought jarringly back to rest in only 1.40 s! Calculate his initial acceleration in G's of by taking its ratio to the acceleration of gravity (9.8 m/s2).
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