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Mkey [24]
3 years ago
15

An airport has runways only 198 m long. a small plane must reach a ground speed of 39 m/s before it can become airborne. what av

erage acceleration must the plane's engines provide if it is to take off safely from its airport? answer in units of m/s 2 .
Physics
1 answer:
Anarel [89]3 years ago
8 0
S: 198 m 
v=39 m/s 
u=0
t=? 
a=?

v²=u²+2as
(39)²=(0)²+2(a)(198) 
1521=396a
1521/396=a
3.84 m/s^2 = a 

Hope I helped :) 
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Dvinal [7]
<h2>Time taken by dryer to come up to speed is 1.625 seconds.</h2>

Explanation:

We have equation of motion v = u + at

     Initial velocity, u =  0 rad/s

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     Time, t = ?

     Acceleration, a = 3.2 rad/s²

     Substituting

                      v = u + at  

                      5.2 = 0 + 3.2 x t

                      t = 1.625 s

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6 0
3 years ago
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mash [69]

<u>Answer:</u>

The spinning of the earth around its own axis causes day and night.

<u>Explanation:</u>

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3 years ago
Debbie touches the metal doorknob to her bedroom at 7 a.m. and feels a static electric shock. In the afternoon, Debbie comes bac
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Explanation:

5 0
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Answer:

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