1)Colonel John P. Stapp, USAF, participated in studying whether a jet pilot coul
ID: 2221959 • Letter: 1
Question
1)Colonel John P. Stapp, USAF, participated in studying whether a jet pilot could survive emergency ejection. On March 19, 1954, he rode a rocket-propelled sled that moved down a track at a speed of 632 mi/h (see figure below). He and the sled were safely brought to rest in 1.40 s. (a) Determine in SI units the negative acceleration he experienced. m/s2 (b) Determine in SI units the distance he traveled during this negative acceleration. m 2)A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.10 s for the ball to reach its maximum height. (a) Find the ball's initial velocity. m/s upward (b) Find the height it reaches. m 3)A model rocket is launched straight upward with an initial speed of 52.0 m/s. It accelerates with a constant upward acceleration of 1.00 m/s2 until its engines stop at an altitude of 160 m. (a) What can you say about the motion of the rocket after its engines stop? This answer has not been graded yet. (b) What is the maximum height reached by the rocket? m (c) How long after liftoff does the rocket reach its maximum height? s (d) How long is the rocket in the air? s 4)A package is dropped from a helicopter that is descending steadily at a speed v0. After t seconds have elapsed, consider the following. (a) What is the speed of the package in terms of v0, g, and t? (Use any variable or symbol stated above as necessary. Let down be positive.) (b) What distance d is it from the helicopter in terms of g and t? d = (c) What are the answers in parts (a) and (b) if the helicopter is rising steadily at the same speed? speed= distance d =Explanation / Answer
a)632mi/h=282.46m/sec b)a=v/t=282.46/1.4=201.76 distance=197.7m 2a)3.10*9.8=30.38m/s b)h=30.38^2/2*9.8=47.089m too many questions for jus 175kp..sorry
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