A 2-kg wood block is pulled by a string across a rough horizontal floor. The string exerts a tension force of 30 n on the block at an angle of 20º above the horizontal. The block moves at constant speed. If the block is pulled for a distance of 3. 0 m, how much work is done by the tension force?.

Answers

Answer 1

Only the horizontal component (the component parallel to the floor) of tension does work on the block. This parallel component has magnitude

(30 N) cos(20°) ≈ 28.2 N

and acts over a distance of 3.0 m, so it performs

(28.2 N) (3.0 m) ≈ 85 J

of work


Related Questions

Which of the following processes suggest that matter is made up of minute particles.

Answers

Answer:

the answer is evaporation

Explanation: Evaporation is the process by which a liquid transforms into vapor (a gas). When some material is in its liquid phase, its particles are really close together (but not as much as we would see in a metal). As the temperature of the liquid increases, also does the kinetic energy of the particles. This cause the particles in the water to move a lot faster, thus its oscillations are larger. This causes an increase in the volume of the material.

Which of the following describes the process of creolization?.

Answers

Answer:

The term creolization describes the process of acculturation in which Amerindian, European, and African traditions and customs have blended with each other over a prolonged period to create new cultures in the New World. ... Since the colonial period, the term has been applied to many aspects of culture.

The process of acculturation known as “Creolization” refers to how Amerindian, European, and African customs and practices have come together over time to form new cultures in the New World. The phrase has been used to refer to a variety of cultural elements since the colonial era.

What best define about process of Creolization?

According to sociologist Robin Cohen, Creolization happens when people choose certain components from an arriving or inherited culture.

Give these new meanings that are distinct from the ones they had in their original civilizations, and then imaginatively combine these to produce new types that replace the earlier forms.

Therefore, Haiti Creole, which was developed by enslaved Africans utilizing vocabulary and syntax from French and African languages, is an illustration of Creolization.

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Choose which word best answers the question. What would you find in un escritorio? una pizarra un cuaderno una mochila un reloj.

Answers

Answer:

You would find papers in Un escritorio (desk)

Chalk in una pizarra (blackboard)

Writing in un cuaderno (journal)

Items in una mochila (bag)

Numbers/ the time on un reloj (clock)

The un cuaderno, word best answers the in un escritorio. Thus, option (b) is correct.

What is word?

The term words refer to the combination of the letters. The words are the always in to define the meaning. The letters are the arranged in proper manner of the spellings are the correct format. The words are the arranged in proper manner in the creation of the sentence. The words are the noun and the pronoun.

The definition of the word is the work surface on a computer screen that replicates the top of a real desk. To form the plural of this sentence, we must first form the plural of its two constituents. When counting, use uno unless talking to a thing or somebody feminine. Even if the nouns are plural, use un before such a male noun and una before a feminine noun.

Therefore, option (b) is correct.

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Unknown element x has four energy levels, five valence electrons, and is a metalloid. What is element x?.

Answers

Answer:

I think the answer is Silicon.

Explanation:

Hope this helps.

How does your power output in climbing the stairs compared to the power output of a 100 watt.

Answers

Answer:

the power output is the amount of gravitational potential energy being carried out by releasing electricity

What is the slope of the line that passes through (5 4) and (7 10).

Answers

Answer:

m=y2-y1/x2-x1

=10-4/7-5

=6/2

=3

slope =3

Where can you find your state specific lottery information.

Answers

Answer:

lottery district offices

Explanation:

Lottery district offices can be found your state specific lottery information.

What is a definition of lottery?

A lottery is a low-odds process or game of chance in which winners are chosen at random. Lotteries can be utilized in decision-making circumstances, such as the distribution of scarce medical care and the selection of sports teams.

With a set of numbers, the lottery game is played in finance. Either manually or automatically, the numbers are selected at random. The picked numbers are intended to win prizes. The prize money may be awarded to the winner as a flat sum or in installments. In general, prize winners prefer receiving a lump sum of money.

The Dutch noun "lot," which means "fate," is where the English word "lottery" originates. The Golden Ambrosian Republic launched the first known Italian lottery on January 9, 1449, in Milan to raise money.

Thus, Lottery district offices.

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Which graph represents a reflection of f(x) = 6(0. 5)x across the x-axis?.

Answers

Answer: f(x)=6(0.5)^x

You are seated in the driver's seat of your parked car, preparing to drive. You must properly fasten your seat belt.

Answers

when we are seated on the drivers seat and about to drive, one safety measure we should endeavour to follow is that we should always fasten our seat belt.

Not only as drivers but as passengers in a vehicle, this will go a long to ensure our safety in the event of a road crash and during impact.

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If angle acb is 34 degrees what is the measure of angle adb.

Answers

Answer:

34 because the shape is split.

Explanation:

Identify the reference angle es001-1. Jpg for each given angle, es001-2. Jpg. Es001-3. Jpg degrees. Es002-1. Jpg degrees. Es003-1. Jpg degrees. Es004-1. Jpg degrees.

Answers

The reference angle is the smallest angle between the terminal side and the x-axis.

[tex](1)\ \theta = 300^o[/tex]

300 degrees is in the 4th quadrant.

So, the reference angle is

[tex]\alpha = 360 - \theta[/tex]

[tex]\alpha = 360 - 300[/tex]

[tex]\alpha = 60^o[/tex]

Hence, the reference angle of 300 degrees is 60 degrees

[tex](2)\ \theta = 225^o[/tex]

225 degrees is in the 3rd quadrant.

So, the reference angle is

[tex]\alpha = \theta - 180[/tex]

[tex]\alpha = 225 - 180[/tex]

[tex]\alpha = 45^o[/tex]

Hence, the reference angle of 225 degrees is 45 degrees

[tex](3)\ \theta = 480^o[/tex]

480 degrees is in the 2nd quadrant (i.e. 480 - 360 = 120)

So, the reference angle is

[tex]\alpha = 180 - \theta[/tex]

[tex]\alpha = 180 - 120[/tex]

[tex]\alpha = 60^o[/tex]

Hence, the reference angle of 480 degrees is 60 degrees

[tex](2)\ \theta = -210^o[/tex]

-210 degrees is in the 2nd quadrant (i.e. 360 - 210 = 150)

So, the reference angle is

[tex]\alpha = 180 - \theta[/tex]

[tex]\alpha = 180 - 150[/tex]

[tex]\alpha = 30^o[/tex]

Hence, the reference angle of -210 degrees is 30 degrees

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Answer:

i

Explanation:

the second one is -1

write notes about type of newtork (based on their Newtork size) ?​

Answers

Answer:

It will brighten up your mode so if you need help watch anime my dude

Explanation:

Based on this excerpt, it can be inferred that the war provides the author with his first flying experience. The author once felt pride and optimism about the war. The us soldiers are trained in hand-to-hand combat. The author has a begrudging respect for the vietcong.

Answers

Based on this excerpt, it can be inferred that: B) the author once felt pride and optimism about the war.

The excerpt is about a young soldier who was excited about entering the U.S military helicopter with the South Vietnamese battalion. He stressed his pride and excitement at being a part of this mission.

He also believed that they will be triumphant in the battle and eventually make their country a better place. So, option B is correct.

Here is the excerpt:

Read this excerpt from "Not a Dove, But No Longer a Hawk."

I remember distinctly the thrill of climbing aboard a U.S. Army helicopter in the cool of the morning and taking off across the rice fields with a South Vietnamese battalion for a day’s jousting with the Vietcong guerillas. I was proud of the young American pilots sitting at the controls in the cockpit and I was grateful for the opportunity to witness this adventure and to report it. We are fighting now, I used to think, and some day we will triumph and this will be a better country.

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Answer:

b

Explanation:

David is a sophomore in high school and is studying for his united states history exam, in which he must recall all of the battles in the american revolutionary war. At first, he begins by just trying to group all of the facts associated with each battle into his memory. When he realizes he is forgetting some battles, he begins repeatedly associating the events that occurred in each battle with the place where the battle occurred. He finds he remembers the battles more readily this way, but he is still having a hard time remembering all the facts associated with each battle. Because he continues to think this is the best way to approach learning, he continues to study in this manner. After several bad grades, he realizes that his studying technique is not working, so he asks a friend who is doing better at remembering everything how she is studying. She said she is making up stories about each battle and how each battle is connected with other battles. David tries this method and finds it was much more effective for him.

Answers

People are often influenced by different things that affect their behavior. The concepts that relates to this scenario is explained below.

Metacognition is known to be the act of thinking about one's own thought and learning. David first use a method to remember the battles in the American Revolutionary war, and later on uses an alternative method. He asked a friend when he saw his errors. This shows that David understood his thought process and is trying too control it.

Method of loci is known as a strategy of memory enhancement that uses visualizations to boast e recall of information. David uses this to link the events that happened in each battle with the place where the battle took place.

Deep processing is known as a step taken in processing spectrum of mental recall via examining of language used.  David's friend uses stories for each battle and connects it with other battles. David then uses deep processing via examining the battles too.

Rehearsal often uses repetition to remember things. David always practicing boast his remembrance of the battles in the American Revolutionary War.

Elaboration is used to enhance total remembrance. By making up stories about each battle and relates it to other battles, it aid David in learning.

Chunking is known as the act of taking different pieces of information and placing them into larger units. David friends sees each battle as a single unit and then they often link up the different events together.

Mental set is known as the ability of the brain to stick with the most familiar solution to a problem and ignore others. David uses the friends method and apply as it aid remembrance more.

See the other part of the question

Explain how each of the following concepts relates to this scenario.

Metacognition

Method of loci

Deep processing

Rehearsal

Elaboration

Chunking

Mental set

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The crew of a garbage truck takes 5 hours to empty all the bins in one neighborhood on pickup day. The city assigned a second garbage truck to this neighborhood. During their training, it took the crew from the second truck 8 hours to empty all the bins. A table showing rate in part per hour, time in hours, and part of bins emptied. The first row shows first truck and has, startfraction 1 over 5 endfraction, t, and startfraction 1 over 5 endfraction times t. The second row shows second truck and has, startfraction 1 over 8 endfraction, t, and startfraction 1 over 8 endfraction times t. When the two crews start working together, what part of all the garbage bins will the first garbage truck empty? 0. 6 0. 5 0. 7 0. 4.

Answers

When the two crews start working together, the part of all the garbage bins that the first garbage truck will empty is; A: 0.6

We are told that the first truck empties all bins in 5 hours. Thus;

Rate of first truck per hour = ¹/₅

Second truck empties all bins in 8 hours. Thus;

Rate of second truck per hour = ¹/₈

If both trucks work together, their rate per hour is;

Combined rate per hour = ¹/₅ + ¹/₈

Combined rate per hour = ¹³/₄₀

Thus, number of hours it will take for both of them to do the whole job, we will solve as;

¹³/₄₀t = 1

where t is the time it will take both of them combined to finish the whole job.

Thus;

t = ⁴⁰/₁₃

The part that the first garbage truck will empty when they both work together = ¹/₅t = ¹/₅ * ⁴⁰/₁₃

⇒ Approximately 0.6

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Answer:

0.6

Explanation:

they will be evenly working together at 0.6

1.Jun _______ France for 4 months.

A. have learnt

B. learnt

C. learns

D. has learnt

Answers

Answer:

has learnt

Explanation:

i think France is supposed to be French

Which of the following statements is true of using internet of things devices in your home.

Answers

The internet of things is a concept whereby multiple devices get to connect  and share data from a common repository. The Internet of Things  refers to a network of physical devices that use sensors, software, and connectivity to share data.

Here are valid statements regarding the internet of things

Has greater Transparency Greater control Greater performance

Example of the application os internet of things

Smart refrigerators, smart watches, smart fire alarms, smart door locks, smart cities, medical sensors, fitness trackers, smart homes

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Incisors (front teeth) act as wedges in the human body. Which change would increase the mechanical advantage of incisors? a decrease in the distance of the teeth from the fulcrum an increase in the distance of the teeth from the fulcrum an increase in the thickness at the widest part of the teeth and no change in the length of the teeth an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

Answers

Based on the information given about the wedge, the option that will increase the mechanical advantage of incisors is D. an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

A wedge simply means a triangular shaped tool that's used as a simple machine. It is used for the separation of objects.

It should be noted that Incisors (front teeth) act as wedges in the human body and there can be an increase the mechanical advantage of incisors when there's an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

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Answer:

D

Explanation:

EDGE 22

When i get multiplied by any number, the sum of the figures in the product is always me. What am i?.

Answers

Answer:

sorry I cannot answer your question I'm just commenting for points

Alyssa is 12 years older than her sister, bethany. The sum of their ages is 44. Find their ages.

Answers

system%28a=b%2B12%2Ca%2Bb=44%29



system%28a-b=12%2Ca%2Bb=44%29

a=28 and b=16

Write an essay of at least 750 words that analyzes the relationship to the entirety of "young goodman brown" to a short passage (no longer than two paragraphs) of your choice from the beginning, middle, or end of the story. Explain how the passage relates to the author's development of theme, characters, or plot. Use details from the story to support your thesis. After completing each step of the writing process, revise your essay, paying close attention to clarity, transitions, and conventions. You should also follow mla guidelines for in-text citations and a works cited page.

Answers

To write an essay that analyzes the relationship between the entirety of "Young goodman brown" and a passage that relates to the development of the theme author, characters or plot, we can choose the following excerpt:

"And when Brown looks up to meet his wife Faith, it's a metaphor for how our faith cannot save us from committing sins, because those who built those beliefs were sinners, and so most religions are based on lies."

This passage relates to the tale's central premises, that humanity lives in a state of depravity, in keeping with the Calvinist belief that God has destined salvation to some through his grace.

Therefore, based on Brown's self-examination, the tale demonstrates how sin is a reality for all humans, regardless of their good practices and actions.

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Never set the tiger free if you live in the mountain.

Answers

The above is a proverb that essentially means that we should not engage in actions that might hurt us later.

Hypothetically speaking, you live in a mountain and one of your traps was able to capture a tiger; you then set that tiger free out and one day it attacks and kills you.

If you had killed the tiger after you caught it, you would still be alive. This is the purpose of the proverb - to say that if you have an opportunity to avoid future danger, take it.

In conclusion, deal with things now before they become problems later.

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It is a process where genes are inserted into the genome of a different organism.

Answers

Answer:

Recombinant DNA technology

Explanation:

Recombinant DNA (rDNA) is a technology that uses enzymes to cut and paste together DNA sequences of interest. The recombined DNA sequences can be placed into vehicles called vectors that ferry the DNA into a suitable host cell where it can be copied or expressed.

Caleb draws two triangles and claims that the triangles are congruent.

Answers

Answer:

your question needs more description or an image. I'll help if you comment the rest of the question.

Explanation:

In what two ways does the el niño wind pattern affect human habitation?.

Answers

it leads to flooding and drought in different areas.

A bag contains chips of which 27. 5 percent are blue. A random sample of 5 chips will be selected one at a time and with replacement. What are the mean and standard deviation of the sampling distribution of the sample proportion of blue chips for samples of size 5 ?.

Answers

Answer:

No. of blue chips contain in a bag = P = 27.5 % = 0.27

No. of chips random selected at a time with replacement = n = 5

We know that the mean and standard deviation of the sampling distribution of the sample proportion  (p) is given by :-

\mu\-_pμ\-p = p

    = 0.275

\sigma_pσp = \sqrt{\frac{p (1-p)}{n} }np(1−p)

Where p= Population proportion and n = sample size.

Let p be the proportion of blue chips.

As per given , we have

p= 0.275

n= 5

= \sqrt{\frac{0.275 ( 1 - 0.275)}{5} }50.275(1−0.275)

= 0.1997

The mean and standard deviation of the sampling distribution of the sample proportion will be 1.375 and 0.9984.

What is the mean and standard deviation?

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a larger range, a low standard deviation suggests that the values tend to be near to the established mean.

A bag contains chips of which 27.5 percent are blue. A random sample of 5 chips will be selected one at a time and with replacement.

Then the mean is given as,

Mean = 0.275 x 5

Mean = 1.375

Then the standard deviation is given as,

Standard deviation = √[5 x 0.275 x (1 - 0.275)]

Standard deviation = √0.99687

Standard deviation = 0.9984

The mean and standard deviation of the sampling distribution of the sample proportion will be 1.375 and 0.9984.

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A student is bouncing on a trampoline. At her highest point, her feet are 95 cm above the trampoline. When she lands, the trampoline sags 25 cm before propelling her back up.

Answers

The time she spent in contact with the trampoline is 0.1619 seconds.

The objective of this question is to determine for how long she is in contact with the trampoline?

The conservational force is exerted on the trampoline is equivalent to the sum of the potential energy at the highest point and the elastic energy at the lowest point.

From the given information;

[tex]\mathbf{mg \dfrac{(95 +25)}{100} = \dfrac{1}{2}k ( \dfrac{25}{100})^2}[/tex]

[tex]\mathbf{m\times g\times 1.2 = k(0.03125)}[/tex]

[tex]\mathbf{m\times 9.8 \times 1.2 = k(0.03125)}[/tex]

[tex]\mathbf{\dfrac{m}{k} = \dfrac{(0.03125)}{9.8 \times 1.2}}[/tex]

[tex]\mathbf{\dfrac{m}{k} = 0.002657}[/tex]

Using the Simple Harmonic Motion to determine the time at which she is in contact with the trampoline, we have;

[tex]\mathbf{t= \dfrac{T}{2}}[/tex]

[tex]\mathbf{t= \dfrac{2 \pi}{2} \sqrt{\dfrac{m}{k}}}[/tex]

where;

[tex]\mathbf{\dfrac{m}{k} = 0.002657}[/tex]

[tex]\mathbf{t= \dfrac{2 \pi}{2} \times \sqrt{0.002657}}}[/tex]

[tex]\mathbf{t=0.1619\ sec}}[/tex]

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Which theme is explored in the selection from the boston girl?.

Answers

The power of encouragement.

Explanation:

* By Anita Diamant, "The Boston Girl" is narrated in first-person a girl, Addie.

* Addie feels empowered after Miss Chevalier encourages her by emphasizing her qualities.

* Miss Chevalier takes care of a settlement house in a poor neighborhood, helping families of immigrants.

* She notices that Addie is a good reader and asks her to memorize a poem for a recital.

* She also teaches Addie the importance of knowing the meaning of words and knowing what words apply to oneself.

* For instance, she teaches Addie that she is a girl with "gumption".

*Addie feels seen, strong, and capable

because of Miss Chevalier.

A 1. 00-g sample of a metal x (that is known to form x2+ ions) was added to 0. 100 l of 0. 500 m h2so4. After all the metal had reacted, the remaining acid required 0. 0334 l of 0. 500 m naoh solution for neutralization. Calculate the molar mass of the metal and identify the element.

Answers

Answer:

7

Explanation:

reason why is beacuse bannanas

What is an equation of a parabola with the given vertex and focus (-2 5) (-2 6).

Answers

Equation of parabola is
4
y
=
x
2
+
4
x
+
24
Explanation:
As the vertex
(

2
,
5
)
and focus
(

2
,
6
)
share same abscissa i.e.

2
, parabola has axis of symmetry as
x
=

2
or
x
+
2
=
0
Hence, equation of parabola is of the type
(
y

k
)
=
a
(
x

h
)
2
, where
(
h
,
k
)
is vertex. Its focus then is
(
h
,
k
+
1
4
a
)
As vertex is given to be
(

2
,
5
)
, the equation of parabola is
y

5
=
a
(
x
+
2
)
2
as vertex is
(

2
,
5
)
and parabola passes through vertex.
and its focus is
(

2
,
5
+
1
4
a
)
Therefore
5
+
1
4
a
=
6
or
1
4
a
=
1
i.e.
a
=
1
4
and equation of parabola is
y

5
=
1
4
(
x
+
2
)
2
or
4
y

20
=
(
x
+
2
)
2
=
x
2
+
4
x
+
4
or
4
y
=
x
2
+
4
x
+
24
graph{4y=x^2+4x+24 [-11.91, 8.09, -0.56, 9.44]}
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