# Help with mastering physics problem 5.138: vertical rocket launch with instrument hanging inside at constant acceleration.?

Part A

Find the minimum time for this rocket to reach the sound barrier (330m/s) without breaking the inside wire.

Part B

Find the maximum vertical thrust of the rocket engines under these conditions.

Part C

How far is the rocket above the earth's surface when it breaks the sound barrier? .

Below is the recommendation and reference answer for question "Help with mastering physics problem 5.138: vertical rocket launch with instrument hanging inside at constant acceleration.?" It was collected and sorted by the editor of this site but not sure the answer is entirely accurate.

A) find the kinematic acceleration:

27.7 N = 17.3N * (9.8m/s² + a) / 9.8m/s²

a = 5.89 m/s²

and now use v = a*t

t = v / a = 330m/s / 5.89m/s² = 56.0 s ◄

B) The thrust must not only provide the kinematic acceleration but must also support the weight as well:

F = m(g + a) = 2.60e4kg * (9.8 + 5.89)m/s² = 4.08e5 N ◄

C) h = ½at² = ♂ * 5.89m/s² * (56.0s)² = 9240 m ◄

OR

h = v² / 2a = (330m/s)² / 2*5.89m/s² = 9240 m

If you find this helpful, please award Best Answer!

### Trending

- Please help me with this!?
- I'm always shocked in everything even in just a whisper What is my health problem or condition thanks?
- Help with my physics homework please! I really dont understand how to do these problems.?
- What word does not fit in these groups? 1-(pressure) (force) (area) (mass) 2-(particles) (diameter) (mass) (motion)?
- Time travel does it exist?
- Is it wrong to ask that where is parallel universe located ?
- If you are driving at the speed of light and you turn your headlights on, what happens?
- Does the Sun orbit the Galaxy?
- What will happen to my boyfriends car?
- Is light speed possible?