can anyone help ? Professional Application Dr. John Paul Stapp was U.S. Air Forc

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can anyone help ?

Professional Application 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 average acceleration during the first part of his motion. Express in multiples of g (9.80 m/s^2) by taking its ratio to the acceleration of gravity. Calculate his deceleration during the second part of his motion. Express in multiples of g (9.80 m/s^2) by taking its ratio to the acceleration of gravity.

Explanation / Answer

Average acceleration = (change in velocity ) / time = (282 - 0) / 5.00 = 56.4 m/s2 = 5.76 g

Average deceleration = (change in velocity ) / time = ( 0 - 282 ) / 1.40 = - 201.43 m/s2 = - 20.55 g

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