What will be the acceleration of a skydiver when air resistance builds up to 86% of her weight? assume the acceleration due to gravity is 10 m/s 2 . answer in units of m/s 2 ?

Answers

Answer 1
Force equals mass times acceleration, F=ma. Rearranging the equation, acceleration = force divided by mass, a=F/m. The skydiver's mass remains constant; therefore, her acceleration is proportional to the total force acting on her body. The total force acting on the skydiver is equal to the force of gravity, which is the same as the skydiver's weight, minus the force of air resistance. When the air resistance builds up to 86% of her weight, the total force equals 14% of her weight (100% - 86%). Her acceleration is 14% of the acceleration due to gravity. a = 0.14 * 10m/s^2 = 1.4 m/s^2.
Answer 2
Final answer:

The acceleration of a skydiver when air resistance is 86% of her weight is calculated by finding the net force on her (weight minus air resistance), then dividing this by her mass. The result is 1.4 m/s^2, reflecting the balance of forces and the concept of terminal velocity.

Explanation:

To calculate the acceleration of a skydiver when the air resistance is 86% of her weight, we must first understand that the net force on the skydiver is her weight minus the force of air resistance. If the air resistance is 86% of the skydiver's weight, then only 14% of her weight is acting downwards. Considering the weight (force) is the mass (m) times the acceleration due to gravity (g), or F=mg. We then have, a = Fnet / m = 0.14 * weight / m = 0.14 * g (as weight = mg).

Given g (acceleration due to gravity) is 10 m/s2, substituting this into our equation gives an acceleration of a = 0.14 * 10 m/s2, which is 1.4 m/s2. Therefore, the acceleration of the skydiver when air resistance builds up to 86% of her weight is 1.4 m/s2.

It's important not only to understand formulae in physics but also the concepts they express. In this situation, that concept is the balance of forces and how they affect an object's movement. In the case of a skydiver, as they fall, air resistance builds up until it equals their weight, causing their acceleration to decrease until they reach a constant velocity, known as 'terminal velocity'.

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Related Questions

If you slow the motion of water molecules down, they are more likely to become

Answers

if you slow the motion of water molecules down, they are more likely to become ice

If you slow the motion of water molecules down, they are more likely to become ice crystal.

What is heat energy?

Most people use the term "heat" to describe anything that feels warm, but according to science, heat is the movement of energy from a heated object to a cooler one.

Heat energy is the only thing that results from the movement of tiny particles known as atoms, molecules, or ions in liquids, solids, and gases. One substance can absorb heat energy from another, and the flow caused by a temperature difference between two objects is referred to as heat.

Hence, If you slow the motion of water molecules down, the heat energy from water molecule is taken away and they are cooled down. And more likely, water molecules are froze down and turns into ice crystal.

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Please Help:

A torpedo fired from a submarine is propelled through the water at the speed of 20.00m/s it explodes on a target 100.0s away. if the sound of the explosion is heard on the sub at 101.4s after launch, what is the speed of sound in water?

Answers

... The torpedo gets 20m farther away every second.
... After 100s, it's 2,000m away.

... It explodes.

... They hear it 101.4s after it was launched.
... That's 1.4s after the explosion.
... The sound covered the 2,000m back to them in 1.4 sec.

Speed = distance / time

= 2000m / 1.4s = 1,428.6 m/s (rounded)

How many joules are in 1 kilowatt hour?

Answers

3600000 are in 1 kilowatt hour

A solar-powered car is traveling at constant speed around a circular track. what happens to the centripetal acceleration of the car if the speed is doubled?
a. the centripetal acceleration remains the same.
b. the centripetal acceleration increases by a factor of 2.
c. the centripetal acceleration is decreased by a factor of one-fourth.
d. the centripetal acceleration increases by a factor of 4.
e. the centripetal acceleration is decreased by a factor of one-half. answer:

Answers

the centripetal accelaration is increased by a factor of 4

Consider a book that weighs 15 N at rest on a flat table. How many newtons of support does the table provide?

Answers

The support force is 15 N. The net force on the book is zero.

A table provides a support force equal in magnitude and opposite in direction to the weight of the book on it; therefore, if the book weighs 15 N, the support force from the table is also 15 N.

The question involves understanding the forces involved when a book is placed on a table. If a book that weighs 15 N is at rest on a flat table, then the table must provide an equal and opposite force to support the book and keep it at rest, according to Newton's third law of motion. Therefore, the table provides a support force of 15 N upward to balance the weight of the book.

How long does it take our solar system to make a complete orbit around our galaxy?

Answers

it takes us about 230 million years

Hope this helps

If a scale of the solar system was built where 1 mm equaled 1 mile, could the model be practically built in a city?

Answers

No, it couldn't be.
On that scale, Neptune would be almost 1,740 MILES from the sun.
ON THAT SCALE !

Answer:

No

Explanation:

Given the relative scale (1mm = 1mile) lets calculate the size of the Sun and distance of planets from the Sun in mm.

Diameter of Sun = 864938 miles = 864938 mm = 864.938 meters

Distance of Earth from the Sun = 92955810 miles = 92955810 mm = 92.955 km = 57.75 miles

Distance of Jupiter from Sun = 480000000 miles = 480000000 mm = 480 km = 298 miles

As can be seen, the magnitude of scaled down distances is too huge to fit inside a city.

It will not be practically possible to make such a model.

Many of the technological advances over the last 50 - 75 years have been in the area of weaponry and warfare, such as atomic/nuclear weapons, radar, biological weapons, etc. These advances have both positive and negative aspects. Which statement describes a negative aspect of these advances? A) The advances in body armor protect individuals and prevent deaths that previously could not be prevented. B) Advances in communication and transportation have made it easier to prevent attacks and rescue those who need be rescued. C) Advances in satellite imagery have made desired targets easy to hit with little destruction of innocent life and property. D) The lingering radiation after detonation of atomic weapons destroys the land and continues to harm people and animals long after the blast.

Answers


I believe it would be D

Answer:

D

Explanation:

The scientist who incorrectly theorized that it was the positive charge that moved through a circuit was...

Answers

The name of the scientist who incorrectly theorized that it was the positive charge that moved through a circuit is Benjamin Franklin. Franklin made his famous experiments with a kite in a charged cloud.
He was the scientist that made the electrical notation where the current is given by the direction of the positive charges flow.  

How much heat energy (in megajoules) is needed to convert 7 kilograms of ice at –9°C to water at 0°C?

Answers

The heat  required to change the phase of a substance can be calculated by using the formula,

q = mCΔT where q is the heat needed, m is the mass of the substance, C is the specific heat capacity and ΔT is the change in temperature.

q = 7000 g (4.18 J/ g °C) (0°C - (-9°C))
q = 263340 J or .26334 MJ
Hope it's correct! ( If so rank as brainliest answer) :)

What physical law(s) predicts the conservation of momentum?

Answers

Consider a collision between two objects - object 1 and object 2. For such a collision, the forces acting between the two objects are equal in magnitude and opposite in direction (Newton's third law). This statement can be expressed in equation form as follows. The forces act between the two objects for a given amount of time. In some cases, the time is long; in other cases the time is short. Regardless of how long the time is, it can be said that the time that the force acts upon object 1 is equal to the time that the force acts upon object 2. This is merely logical. Forces result from interactions (or contact) between two objects.

3. The function of the _______ is to convert the up-and-down motion of the piston into rotary motion that can be used to power the vehicle.

Answers

Answer: crankshaft.

You can see a crankshaft in the image attached.

The crankshaft is the piece colored in red.

When the pistons (coloroued) in gray move up-and-down (called reciprocating motion) the crankshafr spins, so converting the linear motion into rotational motion.




An object is projected horizontally at 8.0 m/s from the top of a 122.5 m cliff. how far from the base of the cliff will the object strike the ground?

Answers

Refer to the diagram shown below.

Assume g = 9.8 m/s² and neglect air resistance.
All quantities are measured as positive upward.

The vertical launch velocity is u = 0.
Let t = the time of flight.

Use the formula s = ut + (1/2)at²
Then
(-122.5 m) = 0 + (1/2)*(-9.8 m/s²)*(t s)²
t² = 122.5/4.9 = 25
t = 5 s

The horizontal distance traveled is
d = (8.0 m/s)*(5 s) = 40 m

Answer: 40 m

If while riding in a smooth-riding train, you toss a coin upward, the coin will normally land ______.

Answers

the coin will normally land on our hand.

Final answer:

The coin will typically return to your hand.

Explanation:

When you toss the coin upward, it follows a parabolic trajectory due to the force of gravity acting on it. However, because you and the coin are moving at the same velocity and in the same direction as the train, no external horizontal forces are acting on the coin. As a result, the coin maintains its horizontal velocity relative to you throughout its motion. This means that while the coin moves vertically, its horizontal position relative to you remains unchanged. Consequently, as the coin descends, it will ultimately land back in your hand, following the same vertical path it took when tossed upward.

Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t(t-0.42) where h is the height in meters above the table and t is the time in seconds. how long does it take the ball to hit the table?

Answers

We are given the equation:

h = -4.9 t (t – 0.42)

 

In this problem, to solve for the time when the ball hit the table, the height h must be equal to zero. That is, h = 0 so that:

0 = - 4.9 t (t – 0.42)

0 = (t – 0.42)

t = 0.42 seconds

The earth is made mostly of metals and rocks. Where did this material come from? It was made by nuclear fission of uranium and other radioactive materials. It was produced in the Big Bang. It was created by chemical reactions in interstellar space. It was made by our Sun. It was produced by nuclear fusion in stars.

Answers

Final answer:

The Earth is composed largely of metals and silicate rock, primarily formed from hydrogen and helium, the simplest elements present from the inception of the universe during the Big Bang. Over time, inside the stars, nuclear reactions fusing these elements resulted in the creation of heavier elements, such as silicon and iron. Elements heavier than iron are synthesized through the powerful explosions of supernovas.

Explanation:

The earth is composed largely of metals and silicate rock which were formed from hydrogen and helium, the simplest elements present from the inception of the universe during the Big Bang. Over time, inside the vastness of the stars, nuclear reactions fusing these elements resulted in the creation of heavier elements, such as silicon and iron which constitutes most of Earth's materials. This process is known as nucleosynthesis.

As time passes, the proportion of these heavier elements in the raw materials that make new stars and planets increases. Therefore, it can be said that Earth, with its abundance of heavier elements, was only possible after generations of stars had a chance to make and recycle their heavier elements.

Finally, elements heavier than iron are synthesized through the powerful explosions of supernovas. So, in essence, all of Earth's components and our very existence can be traced back to the stars and the nuclear reactions within them.

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Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 50.0 kg boy weigh on the moon?

Answers

weigh= Mg [given g=9.8ms-²]
W = 50×9.8 = 490N
it's weight on the moon becomes 1/6×490 = 81.67N

Answer: 80 N

Explanation:

The acceleration due to gravity on Earth is [tex]g=9.8 m/s^2[/tex]. On the Moon, it is 1/6 that on the Earth, so the acceleration due to gravity on the Moon is

[tex]g'=\frac{1}{6}g=\frac{1}{6}(9.8 m/s^2)=1.6 m/s^2[/tex]

The weight of the boy on the moon can be calculated as

[tex]W'=mg'[/tex]

where m=50 kg is the boy's mass. By substituting in the formula,

[tex]W'=(50 kg)(1.6 m/s^2)=80 N[/tex]

What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm?

Answers

The answer to this would be 414 nm

Answer:

Homeboy up top was right its 414nm^^^

Explanation:

EDGE2021

The labels of the axes in a line graph consist of _____. A. only the units of measurement B. only the variable name C. the variable name and units D.
the relationship shown

Answers

I believe that the answer would be c, but I am not certain

Answer:only the variable name

If the planet mars is about 56 million kilometers from earth how long would it take for a radio wave sent from a space satellite circiling mars to reach earth

Answers

190 seconds. The time the radio wave will take to reach Earth is the distance it needs to go divided by the speed of light which is 299792.458 km/s. 56000000 km / 299792.458 km/s = 186.7958933 s Rounding to 2 significant figures gives 190 seconds.

The sun has more mass than earth, which has more mass than the moon. if the distance between each object was the same, which gravitational force would be the largest?

Answers

the sun. boi did this help

identify the chemical change below
a) a piece of wood burns in a fire
b) two pieces of paper are stapled together
c) water is removed by drying wet clothes on a laundry line
d) a large log is cut into boards

Answers

imma say go with C (:

Who is credited with being the first person to accurately determine earth's circumference?

Answers

Eratosthenes of Cyrene

An object placed on an equal-arm balance requires 12 kg to balance it. when placed on a spring scale, the scale reads 12 kg. everything (balance, spring scale, set of masses and object) is now transported to the moon, where the force of gravity is one-sixth that on earth. the new readings of the balance and spring scale (respectively) are:

Answers

equal-arm balance = 12 kg spring scale = 2 kg The equal arm balance measures the mass of an object by using a counter mass on the opposite plate of the balance. The force of gravity affects both the mass being tested and the mass standards being compared against equally. So if the local gravitational field changes, those changes affect both the tested mass and the standard masses equally. Contrast that to the spring scale. In that scale, the spring provides a calibrated level of force irrespective of the local gravitational field. So if the local gravity is higher, the force indicated also is higher. And if the gravitational field is lower, the indicated force is also lower. The strength of the spring DOES NOT CHANGE with changes in the local gravitational field.

Ilya and Anya each can run at a speed of 8.30 mph and walk at a speed of 3.30 mph . They set off together on a route of length 5.00 miles . Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half.


How long does it take Anya to cover the distance of 5.00 miles ?
How long does it take Ilya to cover the distance?
Find Ilya's average speed.

Answers

For Anya:v 1 = 3.3 mph,   v 2 = 8.3 mph5 : 2 = 2.5 mi ( half of the distance )
t1= d/v1 = 2.5 mi/ 3.3 mph = 0.7576 ht2 = d/v2 = 2.5 mi/8.3 mph = 0.3 hIn total: 0.7576 + 0.3 = 1.0576 hFor Ilya: 8.3 t / 2 + 3.3 t / 2 = 5   / * 28.3 t + 3.3 t = 1011.6 t = 10t = 10 : 11.6t = 0.86 hHe covers the distance for 0.86 h.His average speed:v = 5/0.86 = 5.81 mph.


You perform an experiment in which you find out how much mass evaporates from a liquid when it is placed in direct sunlight or in the shade. Which piece of technology is appropriate for gathering the experimental data you need? A. Tape measure B. Thermometer C. Computer D. Scale

Answers

The correct option is SCALE.
This is because the experimental data you are interested in is mass and scale is the instrument that is used to measure mass. To use the scale, measure the mass of your water before you put it inside the sun and measure the mass again after you remove it from the sun. The difference in mass is the quantity of water that is evaporated.
 There are different type of scale and the one that you use will depend on the size of the material that you want to measure.

A rock falls freely from rest near the surface of a planet where acceleration due to gravity is 4.0 meters per second per second. what is the speed of this rock after it falls 32 meters?

Answers

The speed of the rock after it has fallen [tex]32\text{ m}[/tex] near the surface of the planet is [tex]\boxed{16\text{ m/s}}[/tex].

Explanation:

Given:

The acceleration due to gravity on the surface of the planet is [tex]4.0\text{ m/s}^2[/tex].

The distance through which the rock falls is [tex]32\text{ m}[/tex].

Concept:

As the rock falls near the surface of he planet, it falls freely under the action of the acceleration due to gravity i.e. the gravitational pull of the planet acting on the rock.

The acceleration due to gravity is different on the surface of the different planets. It depends on the mass and radius of the particular planet.

The final speed of the rock after falling through a particular distance is given by the third equation of motion.

[tex]\boxed{v_f^2=v_i^2+2gS}[/tex]

Here, [tex]v_f[/tex] is the final velocity of rock, [tex]v_i[/tex] is the initial velocity, [tex]g[/tex] is the acceleration due to gravity on planet and [tex]S[/tex] is the distance covered by the rock.

As the rock falls from the rest, the initial velocity of the rock will be zero.

Substitute the values in above expression.

[tex]\begin{aligned}v_f^2&=(0)^2+2(4)(32)\\v_f&=\sqrt{256}\\&=16\text{ m/s}\end{aligned}[/tex]

Thus, The speed of the rock after it has fallen [tex]32\text{ m}[/tex] near the surface of the planet is [tex]\boxed{16\text{ m/s}}[/tex].

Learn More:

1.  A 30kg block being pulled across a carpeted floor brainly.com/question/7031524

2.  Net force acting on a 200kg refrigerator brainly.com/question/7031524

3. Max and Maya are riding on a merry-go-round brainly.com/question/8444623

Answer Details:

Grade: High School

Subject: Physics

Chapter: Laws of motion

Keywords:

acceleration, gravity, rock, planet, surface, equation of motion, initial, final, distance, velocity, 32 m, 16 m/s.

The speed of a rock falling 32 meters on a planet with 4.0 m/s² gravity is 16 m/s.

To determine the speed of a rock that falls freely from rest near the surface of a planet where the acceleration due to gravity is 4.0 meters per second squared, we can use the following kinematic equation:

v² = u² + 2as

Here:

v is the final velocityu is the initial velocity (0 m/s as the rock falls from rest)a is the acceleration due to gravity (4.0 m/s²)s is the distance fallen (32 meters)

Substituting in the given values:

v² = 0 + 2 × 4.0 m/s² × 32 m

v² = 256

Taking the square root to find the speed:

v = √256

v = 16 m/s

Therefore, the speed of this rock after falling 32 meters is 16 meters per second.

a girl pushes a cart to the left a 100-N force. a boy pushes it to the right with a 50-N force. The net force exerted on the cart is

Answers

Since the net force is the amount of force favoring the side with the most force acted upon it,

100 - 50 = 50

50N to the left

Hope this helps!

) what is kinetic energy, and how does it differ from potential energy?

Answers

 Kinetic energyis the energy of body or a system with respect to the motion of the body or of the particles in the system. Potential energy is the stored energy in an object of system because of its position or configuration.

What color of light in the visible spectrum appears brightest?

Answers

The color green is the the color of light in the visible spectrum which appears the brightest, but with proper illumination, the color green-yellow appears to be the brightest, with the human eye having the maximum sensitivity of 555nn
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