3 years ago

Will mark as brainliest!

Physics

1 answer:

Papessa [141]3 years ago

3 0

A. Between planet A and planet B i believe is the correct answer

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What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway? a plane accelerates from

ElenaW [278]

When is at the end of the runway the velocity of the plane is given by the equation $vf^{2}=0+2*a*s$ where s=1800 m is the runway length. Thus
$vf^{2}=2*5*1800=18000 (m/s)^{2}$
$vf =134.164 (m/s)$

At half runway the velocity of the plane is
$v^{2}=2*5* \frac{1800}{2}=9000 ( \frac{m}{s} )^{2}
$
$v= \sqrt{9000}=94.87 ( \frac{m}{s})$

Therefore at midpoint of runway the percentage of takeoff velocity is
‰ $P= \frac{v}{vf}= \frac{94.87}{134.164}=0.707$

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3 years ago

The average height of an apple tree is 4.00 meters. How long would it take an apple falling from that height to reach the ground

Elodia [21]

We know, s = ut + 1/2gt²
In free-fall, u = 0
so, t = √2s/g

Now, substitute the values,
t = √2*4 / 9.8 [ -ve sign shows opposite direction only ]
t = √8/ 9.8
t = 0.90 sec

In short, Your Answer would be 0.90 sec

Hope this helps!

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snow_lady [41]

The correct answer would be 1.375 < t < 3 i hope this helps anyone

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A ball is rolled uphill a distance of 13 meters before it slows, stops, and begins to roll back. The ball rolls downhill 27 mete

yarga [219]

Magnitude of displacement means the total displacement. Basically taking your final distance and subtracting it from your initial distance so it would be 14m

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Verdich [7]

Mutualism is the correct answer

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