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bezimeni [28]
3 years ago
15

A cartoon plane with four engines can accelerate at 8.9 m/s2 when one engine is running. What is the acceleration of the plane i

f all four engines are running and each produces the same force?
Physics
1 answer:
egoroff_w [7]3 years ago
5 0

Answer:

The acceleration of the plane is 35.6 meters per square second.

Explanation:

By Newton's Laws of Motion, we know that force (F), in newtons, is directly proportional to acceleration (a), in meters per square second. That is:

F \propto a

If four engines are running simultaneously and each produce the same force, then we find that acceleration of the plane is:

a_{T} = 4\cdot \left(8.9\,\frac{m}{s^{2}} \right)

a_{T} = 35.6\,\frac{m}{s^{2}}

The acceleration of the plane is 35.6 meters per square second.

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____ is a type of circuit were there is a direct connection between two points in a circuit that aren't supposed to be directly
PtichkaEL [24]

Answer:

Short

Explanation:

I took the same test

7 0
3 years ago
If a satellite weighs 321 lb. on the earth's surface (R = 4,000 miles), how much does it weigh 12,000 miles above the surface? (
Sever21 [200]

The gravitational force between the Earth and the satellite (its "weight") is inversely proportional to the distance between the centers of both objects.

On the surface, their centers are separated by 1 Earth radius.

12,000 miles above the surface, they're separated by 4 Earth radiii.

(4/1) = 4

So after the move, the satellite's weight is (1/4²) = 1/16 of its surface weight.

(321 lb) / (16) = (20 and a hair) lb

The correct choice from the given list is " <em>>20 lb "</em> .  

3 0
3 years ago
An 80.0-kg object is falling and experiences a drag force due to air resistance. The magnitude of this drag force depends on its
Zinaida [17]

Answer:

 Terminal velocity of object = 12.58 m/s

Explanation:

 We know that the terminal velocity is attained when drag force and gravitational force are of the same magnitude.

Gravitational force = mg = 80 * 9.8 = 784 N

Drag force = 12.0v+4.00v^2

Equating both, we have

    784=12.0v+4.00v^2\\ \\ v^2+3v-196=0\\ \\ (v-12.58)(v+15.58)=0

  So v = 12.58 m/s or v = -15.58 m/s ( not possible)

 So terminal velocity of object = 12.58 m/s    

3 0
3 years ago
A ball is thrown straight up with enough speed so that it is in the air for several seconds. Assume the positive direction is up
Andrew [12]

Answer:

a) v= 0 m/s b) v= 6.86 m/s

Explanation:

a) When the ball reaches to its highest point, under the influence of gravity, before starting to fall down, it momentarily comes to an stop (this is needed prior to change direction in any movement), so, applying the definition of acceleration, and replacing the acceleration a by g, we have:

vf = v₀ - g*t (1)

The minus sign means that the acceleration due to gravity is always downward, so if we assume that the positive direction is upwards it must be negative.

At the highest point, vf= 0.

b) Prior to solve this point, we need to know which is the time when the ball reaches to its highest point.

As we know vf=0, we can solve (1) for t, as follows:

th = v₀/g

Now, for a time that is 0.7 s before this time, applying the acceleration definition and solving for v again, we have:

v = v₀ -(g *(th-0.7 s)), but th= v₀/g, so we get:

v= v₀ -g((v₀/g)-0.7 s) = v₀ - v₀ + g*0.7 s

⇒ v=g*0.7 s = 9.8 m/s²*0.7 s

⇒ v = 6.86 m/s

6 0
4 years ago
Rosa listed some advantages and disadvantages of using renewable resources. Which best describes Rosa’s error?
Vlada [557]
One disadvantage<span> with </span>renewable energy<span> is that it is difficult to generate the quantities of electricity that are as large as those produced by traditional fossil fuel generators

One advantage</span><span> with renewable energy is that as it is renewable it is therefore sustainable and so will never run out.

I dont know who you are referring to as "rosa" i hope this helps  


</span><span>
</span>
5 0
3 years ago
Read 2 more answers
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