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Nookie1986 [14]
3 years ago
6

a plane flying due east at 395 km/h, is hit by wind blowing at 55 km/h toward the west. what is the resultant velocity of the pl

ane?
Physics
2 answers:
Aleonysh [2.5K]3 years ago
6 0
In this case, you simply use subtraction to find out the velocity.  If the plane is flying at 395 km/h and is being blown by 55 km.h wind the other way, the velocity of the plane is 395 - 55.

395 km/h - 55 km/h = 340 km/h

So, the final velocity of the plane is 340 km/h east.
FrozenT [24]3 years ago
4 0

I think this is a situation where it's pretty important to mention the reference
frame in which the velocity is being measured.  You've got two different reference
frames going on here.

-- If the plane is flying east at 395 km/hr with respect to the ground, then
that is its velocity with respect to the ground ... 395km/h east.  If in addition
we know that the air is moving 55 km/h west with respect to the ground,
then the plane's velocity with respect to the air around it must be 450 km/h .

-- If the plane is flying east at 395 km/hr with respect to the air around it,
and the air in turn is moving 55 km/h west with respect to the ground, then
the plane's velocity is still 395 km/h through the air (its 'air speed'), and
340 km/h with respect to the ground (its 'ground speed').

The 'ground speed' is the vector sum of the 'air speed' and the wind speed.
There are special plastic devices made that a solo pilot can use to do this
calculation with one hand while he's flying.  He can read his air speed from
a gauge in his plane, and he gets wind speed and direction for his location
by radio from air traffic control centers or flight service stations along his route.
Then he has to calculate what direction he should point the nose of his plane
in order to proceed along the ground in the direction he wants to go.
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Find the interest. A 105-day note for $14,200 at 8.5% interest.
mr Goodwill [35]
<h3><u>Answer</u>;</h3>

$347.22

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

Principal = $14,200

Rate = 8.5%

Time = 105 days = 105/365

Interest = Principal x Rate x Time

Interest = 14,200 x 0.085 x 105/365

Interest = 347.219

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7 0
3 years ago
Consider a horse pulling a buggy. Is the
Degger [83]

Yes, it's true.

But 2nd Newton Law always come to play when the horse is to move forward because obviously the forces interact antagonistically and mass has to be accounted for.

That's what I think. Hope it's right, all the best.

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3 years ago
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tatyana61 [14]

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6 0
2 years ago
Which explains the information needed to calculate speed and velocity?
Anestetic [448]

Both require time, but velocity requires displacement and speed requires distance.

Explanation:

Speed and velocity are two different quantities. In fact:

- Speed is a scalar quantity, which gives a measure of how fast an object is moving, regardless of its direction. Therefore, it only has a magnitude, which is given by the ratio between distance covered and time taken:

s=\frac{distance}{time}

Therefore, speed does not take into account the direction of motion.

- Velocity, on the other hand, is a vector quantity, so it has magnitude and a direction.

The magnitude of the velocity is given by

v=\frac{displacement}{time}

where displacement is a vector connecting the initial point with the final point of motion of an object.

The direction of the velocity corresponds to the direction of the displacement.

It must be noted also that in certain situations, the average velocity is zero, while the speed is not zero: for example, for an object completing a circle in a certain time interval, its speed is not zero, while its velocity is zero (because the object returns to the starting point, so the displacement is zero.

Therefore, the correct answer is

Both require time, but velocity requires displacement and speed requires distance.

Learn more about speed and velocity:

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#LearnwithBrainly

3 0
3 years ago
What is meant by the following statement? "Acceleration is inversely proportional to mass." Acceleration decreases as mass decre
Vladimir79 [104]
It means, <span>Acceleration increases as mass decreases.

So, option C is your answer.

Hope this helps!
</span>
3 0
3 years ago
Read 2 more answers
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