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Sergeeva-Olga [200]
3 years ago
12

a 727 jet needs to attain a speed of 200 mph to take off. if it can accelerate from 0 to 200 mph in 30 seconds, how long must th

e runway be? (assume constant acceleration) ...?
Physics
1 answer:
labwork [276]3 years ago
5 0
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

Since v = dx/dt = 200t

I took the integral of dx = integral of 200t dt

and I got x = 100t^2 + C

So I plugged in 0.5 as t and got x = 25

So x = 25 miles
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A pendulum has a length of 2 m and a 30 kg mass hanging on the end. What is the period of the
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Answer:

T = 2.83701481512 seconds

Explanation:

Hi!

The formula that you will want to use to solve this question is:

T = 2\pi *\sqrt{\frac{L}{g}  }

T--> period

L --> length of the pendulum

g --> acceleration due to gravity (9.8m/s^2)

since we know that the mass of the bob at the end of the pendulum does not affect the period of the pendulum, we can go ahead and ignore that bit of information (unless, of course, the weight causes the pendulum to stretch)

so now we can plug in our given info into the formula above and solve!

T = 2*pi * sqrt(2/9.8)

T = 2.83701481512 seconds

*Note*

- I used 3.14 to pi, if you need to use a different value for pi (a longer version, etc) your answer will be slightly different

I hope this helped!

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<h3><u>Answer;</u></h3>

= 73 N

<h3><u>Explanation</u>;</h3>

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The answer is a tell me if I am wrong.
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