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rewona [7]
3 years ago
6

What is terminal speed? When a skydiver has reached terminal speed, what is the are resistance equal to? What is the skydiver’s

acceleration? Be sure to use at least 3 to 4 complete content related sentences.

Physics
2 answers:
Alla [95]3 years ago
6 0
Terminal speed is the maximum speed that a falling object can reach and is based on aerodynamic resistance. In a vacuum, an object falling toward a planet as a result of gravity will continue to accelerate until it hits the ground.

However, if the object is falling through an atmosphere, such as on earth, then it will accelerate up to the point that the aerodynamic resistance cancels the downward force due to gravity, and it travels at a constant maximum speed, called the terminal velocity. At this point, resistance is equal to acceleration due to gravity. At terminal velocity, the skydiver's acceleration is zero.
shutvik [7]3 years ago
3 0

Answer:

  • <u>Terminal Speed:</u>  

When a body starts a free fall motion towards the planet earth's surface or the ground it is under the free fall motion, which means that there is a net force,F(gravity) applied on it by the planet. Now, there will be also the mass,m of the object which will tend to move much faster towards the earth. But, a point will come when the total amount of tension due to the moment of the object balances with the gravitational pull of the planet.As, there is a net constant speed attained by the object in moving towards the surface of the planet.

  • <u>The air resistance,R(due air):</u>

The gravitational force and the tension presented by the motion equals,as  the motion becomes more constant in nature covering each point in equal intervals of time. Because, the upthrust force becomes equal to the downward force presented by the object itself.

Upthrust force= Downward force.

  • <u>Acceleration during free fall motion:</u>

The value of acceleration,a will be same for each and every object moving towards the planet with a terminal velocity,Vt. As, it will be 9.8 m/sec² which is supposed for each object, irrespective of its properties and size.

Example: When paratrooper jumps from a plane, at first he is moving with the increasing speed and velocity but when he reaches a point or level where the upthrust force provided by the drag and the downward force due to the gravity of planet levels, the body attains the acceleration value around 9.8 m/sec².

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Is everyone in your class able to hear a quiet sound equally well?
Sergio039 [100]

Answer:

No

Explanation:

Loudness describes how people perceive sound (see loudness). ... If people could hear equally well at all frequencies, the contour lines would be flat because the same measured sound intensity would be perceived to be equally loud regardless of the sound frequency. In fact, people do not hear as well at low frequencies.

8 0
3 years ago
A garden hose having with an internal diameter of 1.1 cm is connected to a (stationary) lawn sprinkler that consists merely of a
trapecia [35]

Answer:

Water leaves the sprinkler at a speed of 2.322 m/sec

Explanation:

We have given internal diameter of the garden d_1=1.1cm

Speed of water in the hose is v_1=0.95m/sec

Number of holes n = 22

Diameter of each holes d_2=15cm

According to continuity equation A_1v_1=A_2v_2

d_1^2\times v_1=22\times d_2^2v_2

1.1^2\times 0.95=22\times 0.15^2\times v_2

v_2=2.322m/sec

So water leaves the sprinkler at a speed of 2.322 m/sec

6 0
2 years ago
If a ball leaves the ground with a vertical velocity of 5.46 m/s, how long does it take
kifflom [539]

Answer:

0.557 s

Explanation:

Given:

v₀ = 5.46 m/s

v = 0 m/s

a = -9.8 m/s²

Find: t

v = at + v₀

0 m/s = (-9.8 m/s²) t + 5.46 m/s

t = 0.557 s

8 0
3 years ago
Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories. What are these categorie
Sauron [17]

Answer:

Explanation:

Scientific evidence takes note of the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography.

Examples of the categories with their respective examples are:

Direct observation of evolutionary change: Development of drug resistant bacteria

Fossil record: Discovery of transitional forms of horses, Discovery of shells of extinct species

Homology: Similarities in mammalian forelimbs, Same genetic code in fireflies and tobacco plants, Vestigial pelvis in right whales

Biogeography: Similarity of endemic island species to nearby mainland species, The high concentration of marsupial species in Australia

3 0
3 years ago
State the Newton 2nd law of motion and also prove that F= ma<br>​
saw5 [17]

Explanation:

F = ma is the formula of Newton's Second Law of Motion. Newton's Second Law of Motion is defined as Force is equal to the rate of change of momentum. For a constant mass, force equals mass times acceleration.

...

3 0
3 years ago
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