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alexdok [17]
3 years ago
15

Colonel John P. Stapp, USAF, participated in studying whether a jet pilot could survive emergency ejection. On March 19, 1954, h

e rode a rocket-propelled sled that moved down a track at a speed of 632 mi/h. He and the sled were safely brought to rest in 1.40 s.
a) Determine the negative acceleration he experienced.

_ _ _ m/s
2

b) Determine the distance he traveled during this negative acceleration.

_ _ _ m
Physics
1 answer:
Nostrana [21]3 years ago
5 0

Answer:

a) Deceleration = 201.76 m/s^2

b) Distance traveled = 197.68 m

Explanation:

Initial Speed = 632 mi/h

Initial Speed (in meters/second) = (632 * 1.609 * 1000) / (60 * 60) = 282.4 m/s

Time to decelerate = 1.4 seconds

a)  Change in speed = Acceleration * time

-282.4 = Acceleration * 1.4

Acceleration = -201.76 m/s^2

Deceleration = 201.76 m/s^2

b)  Distance traveled = average speed * time

average speed = 282.4 / 2 = 141.2 m/s

Distance traveled = 141.2 * 1.4

Distance traveled = 197.68 m

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Explanation:

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A force of 100. newtons is used to move an object a distance of 15 meters with a power of 25 watts. Find the time it takes to do
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<h3>It takes 60 seconds to do the work</h3>

<em><u>Solution:</u></em>

Given that,

Force = 100 newtons

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Power = 25 watts

To find: time it takes to do the work

<em><u>Find the work done:</u></em>

work = force \times displacement\\\\work = 100\ newtons \times 15\ meters\\\\work = 1500\ joule

<em><u>Find the time taken</u></em>

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