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 (a) acceleration and (b) deceleration. Express each in multiples of g (9.80 m/s2 ) by taking its ratio to the acceleration of gravity.

Problem 17PE

Solution 17 PE

Step 1 of 3:

In this question , we need to find the acceleration and deceleration of Stapp rode rocket, and we

need to express the acceleration in terms of gravitational constant

Data given

Initial velocity

Final velocity

Time taken

Time to decelerate

Step 2 of 3 :

Acceleration is given by

Substituting values we get

Thus we have acceleration as

Acceleration in terms of gravitational constant is given by

Thus we have acceleration in terms of g as