If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about Newton’s laws of motion to explain why the book is not falling. (giving away brainliest!)

Answers

Answer 1
Frictional force is defined by the following formula -

f = coefficient of friction (u) X Normal reaction exerted by the surface (N)

So, f = u X N.

Now 'u' is a constant for given surfaces in contact ( keep in mind that it depends on both the surfaces that are in contact with each other, here wall and the book that you are pressing)

Now, Normal reaction is equal and opposite to the force exerted by an external force on the surface, PERPENDICUAL TO THE SURFACE ( or the perpendicular component of the external force). The external force exerted on the surface which is vertical to it, in this case, is equal to the force that you are applying while you are holding/pressing the book against the wall.

So, at any point of time, frictional force = u X (Force you are applying on the surface, via the book)

Or, f = u X F, where,
f = frictional force,
u = coefficient of friction, and
F = Perpendicular component of the force exerted by you on the book towards the surface.

Now direction of f -
Frictional force always act parallel to the surface and in opposite direction to the direction of motion.

In absence of friction, book will fall down, because of gravity acting on it. So friction will try to act in the opposite direction of this motion. So, upwards in this case.

If let's say you have a metal object placed between magnets, which is applying more force on it than gravity, in upwards direction; and you try to press it against the wall, the motion of object will be upwards, so friction will then act downwards.

Friction always opposes the direction of motion in which the object would have moved because of RESULTANT FORCE on it in absence of friction.

Takeaways in English (or, common observation) -
1) Harder you press the book against the wall, harder it will be for a person to move the book on the surface of the wall, while you are pressing it. Because of higher friction.

2) The more you move the book on the wall, while keep on pressing it, warmer the surface of the book which is in contact with wall will be. Because if more energy is dissipated per second to overcome friction, which gets converted to heat energy.

2.1) Harder you press, book will heat up faster.

3) Harder you press the book against the wall, lesser chance are that it will fall down. Because more frictional force is now acting on it to hold it against gravity.

4) Heavier the book, more frictional force is needed to hold it from falling, and that is why you have to press it harder to hold Heavier books.

5) That is all I can think of right now. Try applying this concept in things you see around.
12.8K viewsView 6 Upvoters · Answer requested by Muhammad Shouman
Related Questions (More Answers Below)

Related Questions

Can someone help me please? thanks

Answers

Answer:

C or 3rd option

Explanation

HELP EXPERT I NEED HELP

Answers

Answer: ML is 105 for the bottom answer and 105 m3 for the top answer did this on edguinuity

PLEASE HELP!!!!! Thalia is drafting a plan to move a large, perfect sphere concrete sculpture that is in front of her office building. Describe the considerations Thalia would need to make if she was drafting a plan to move the sculpture.

Answers

Answer:she should consider the  time on how long it would take to move it and where she will move it

Explanation:

hope this helps

HaLp PlEsSsS

Write a paragraph of five sentences or more explaining how the radio uses the behavior and characteristics of the radio wave to function.

You must include citations for all reliable sources used. Include citations from three or more reliable sources.

Answers

Answer:

hey! answer below:

Paragraph:

The radio uses the behavior and characteristics of the radio wave to function because there is... I don't have the time to write a paragraph of five sentences or more explaining how the radio uses the behavior and characteristics of the radio wave to function. I am supposed to be doing math but instead, I am doing this. Please don't get mad! I have a 97 in ELA and a 104 in engineering, I hope you care. I just wanna get these points bro.

7 pointsblaksnsksnsbensnxnsjddbbsnsjsjnxjxkkxxkksks

Follow these steps to compare pieces of sticky tape that have the same charge:

Tear off two pieces of clear sticky tape that are about 15 cm (6 inches) long. Stick the two pieces of tape side by side on the tabletop.
Tear off two more pieces of tape, and fold under a half inch of each piece as shown in the side view. This tab makes them easy to pull off later on. Stick these pieces of tape onto the pieces already on the table and smooth them down.
tape folded to create a tab
Using both hands, grab the tabs of the two top pieces of tape. Carefully pull both top pieces of tape off the bottom pieces. Turn the non-sticky sides of the tape toward each other.
What do you observe? If there’s an interaction, explain whether the tape pieces attract or repel each other.

Answers

Answer:

they would atrract because they are sticky but when you take it off it would ware off

Explanation: I have used tape before and when you stick something to it then take it off it wares off

Two pieces of sticky tape with the same charge are formed when the non-sticky sides of the tape remain facing each other, it is observed that there is an interaction between the two pieces of tape, but the attraction and repulsion depend upon their charges.

What is the significance of attraction and repulsion?

If the two pieces of tape have the same charge, they will repel each other, and as a result, the pieces of tape will move away from each other and if the two pieces of tape have opposite charges, they will attract each other, and as a result, the pieces of tape will move towards each other. The electric fields that are created by each piece of tape attract each other if they have differing in charges.

Hence, interaction between the two pieces of nonstick tape is observed, and the attraction and repulsion depend upon their charges.

Learn more about attraction and repulsion here.

https://brainly.com/question/10895182

#SPJ2

what are the independent and dependant variables in Plate Tectonics Lab Report?

Answers

Answer:

Independent= amount of years.

Dependent= geologic events

Explanation:

The blue mass in the image is 10kg.


The red mass in the image is 10kg.


The blue mass is currently 4 meters away from the red mass.


If we change each mass to 20kg, what will happen to the gravitational force each mass puts on the other?? You have to pick a answer through A,B,C! The force of gravity will increase as the masses increase.



The force of gravity will not change as the masses increase.



The force of gravity will decrease as the masses increase.

Answers

i think it’s a correct me if i’m wrong
I’m pretty sure it is A!

What are some of the landforms rovers have found on Mars that show it was once an active place?

Answers

Answer:

The Curiosity rover found that ancient Mars had the right chemistry to support living microbes. Curiosity found sulfur, nitrogen, oxygen, phosphorus and carbon-- key ingredients necessary for life--in the powder sample drilled from the "Sheepbed" mudstone in Yellowknife Bay.

Explanation:

Hope it helped

Answer:

,

Explanation:

The downward force of gravity and the upward force of air resistance on a ball are both 5N. What is the ball's acceleration?

Group of answer choices

-5 m/s

5 m/s

10 m/s

0

Answers

Answer:

0

Explanation:

I believe they both cancel each other out, I might be wrong though

The answer would be 0

True or False this is a black hole 75 points + Brainliests

Answers

Answer:

true

Explanation:

lol idek tbh

Answer: true?

thx for the points anyway

Explanation:

What is most likely to occur during a chemical reaction

Answers

Answer/Explanation:

In a chemical reaction, the atoms and molecules produced by the reaction are called products. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

This question involves the concepts of a chemical reaction, conservation of mass, chemical bonds.

During a chemical reaction, the phenomenon that is most likely to occur from the given phenomena is "Mass is conserved".

Whenever a chemical reaction occurs old bonds between the elements are broken and new bonds are formed amongst different elements. Hence, the properties of the original substances are changed due to the formation of new bonds, and new molecules as a result.

Original molecules or substances are lost due to formation of the new ones.

No new atoms are created or destroyed in a chemical reaction. The atoms just rearrange themselves to form new molecules or substances only.

Since no atoms are created or destroyed during a chemical reaction. Hence the law of conservation of mass is applicable to a chemical reaction. This means the mass is conserved during a chemical reaction.

Learn more about the chemical reaction here:

https://brainly.com/question/18671493?referrer=searchResults

The attached picture shows different types of chemical reactions.

A group of students is investigating whether the smoothness of a surface affects the force of friction. Each student pushes a book on two different surfaces. One surface is ice and the other is concrete. The distance traveled by the book on each surface is shown.


Experimental Observations
Student 1 Student 2 Student 3 Student 4
Distance traveled by book on ice 23 cm 21 cm 24 cm 22 cm
Distance traveled by book on concrete 15 cm 18 cm 16 cm 17 cm


Based on the table, which conclusion is correct about the average distance traveled?
A. It is less on concrete.
B.It is greater on concrete.
C.It is less when the book is pushed harder.
D. It is independent of the type of surface.

Answers

D is the answer UwU I think so

Answer:

The answer is D

Explanation:

I took the quiz:)

IF YOU GET GOOD GRADES ON SCIENCE TESTS PLEASE HELP ME!!!!!
The student develop the model above ( its really below) . usually the model, identify two potential wave phenomena that occur and are the reason behind why the student can only hear the train in front of the apartment complex.
A. the train can be heard more easily in front of the apartment complex because of reflection and interference. as the sound comes from train, the sound waves reflect off of the complex and interfere with each other increasing amplitude of the wave to make it easier.
B.the train can not be heard ad easily in the park because of reflection and diffraction. the sound reflects off of the trees in the park and diffract between the tree, this causes the waves to bend too much to be heard.
C.the train can be heard more easily in front of the apartment complex because of diffraction and refraction. the sound waves diffract between the other buildings aiming them towards the apartment complex and then the sound refracts through the apartment complex which makes it more difficult to hear in the park.
D.the train can not be heard as easily in the park because of interference and reflection. the other buildings in front of the park cause interference of the sound waves from the train and the trees in the park cause reflection making it too hard to hear the train.
(please be 100% sure about your answer)

Answers

Answer:

A i think hope this helps

Explanation:

Answer:

A

Explanation:

The sound wave hits the apartment complex first.

im sure this is physics and not science

Rahul sees a flock of birds. He watches as the flying birds land in neat little rows on several power lines. Which change of state does the motion of the birds most closely model?

melting
vaporization
deposition
sublimation

Answers

Answer:

C.) Deposition.

Explanation:

I just took the unit test

The change of state that Rahul sees and models the motion (movement) of the birds is called deposition.

What is deposition?

In physics, deposition can be defined as a transition phase from a gaseous state to a solid without the need to pass to a liquid state.

The physical phenomena of deposition are relatively common in nature and they include many natural processes.

In conclusion, the change of state that Rahul sees and models the motion (movement) of the birds is called deposition.

Learn more about deposition here:

https://brainly.com/question/1128134

#SPJ5

Can someone help me


Which of the following would a good frame of reference?

A) the moon

B) a tree

C) a rabbit

D) your sister while she rides her bike

Answers

B i believe i could be wrong but idrk

PLZ ANSWER QUICKLY
Janice has just measured the density of an object. Which value is possible? (Density: D = )

A.–1 g/cm3
B.4 m/s
C.–3 m/s
D.6 g/cm3

Answers

Density is mass over volume, so I would need the measurements of the object.
the answer should be b 4m/s

Hyperopia occurs because the eyeball is too ____________, causing images to be focused behind the retina.



PLEASE HURRY! WILL GIVE BRAINLIEST!

Answers

Answer:

Hyperopia occurs when the image formed by the focusing mechanism of the eye is “behind” the retina. This often occurs if an eye is shorter than average.

Explanation:

Hyperopia happens when a persons eye is smaller than others, when this happens a person would likely need glasses

Answer:

short

Explanation:

HELP FAST CORRECT ANSWERS ONLY
Why is the dust tail of the comet curved instead of straight?
A.
the ions move at a much slower speed than ions of the ion tail.
B.
The ions move at a much faster speed than ions of the ion tail.
C.
The gravitational pull of Jupiter causes the curve.
D.
The gravitational pull of Earth causes the curve.

Answers

It’s A bc the comet trail r form the comet and I got melt off

Which contributions did Johannes Kepler make? Check all that apply.

Which contributions did Johannes Kepler make? Check all that apply.

He revived Aristotle’s model of the solar system.
He solved Ptolemy’s model by proving elliptical orbits.
He proved Galileo’s calculations were incorrect.
He determined that planets move faster when closer to the Sun.
He discovered laws of planetary motion.

Answers

Answer:

he solved ptolemy's model of the solar system

he determined that planets move faster when closer to the sun

he discovered laws of planetary motion

Explanation:

•✧•

John Kepler made significant contributions to optics and geometries. Options 2,4 and 5 are the statement that shows the contribution of Johannes Kepler.

What are the contributions of  Johannes Kepler?

Johannes Kepler was indeed an astronomer and mathematician who finds the planet's elliptical orbits around the sun.

He identifies three basic rules of planetary motion. He also made significant contributions to optics and geometries.

Following are the contributions of Johannes Kepler;

2. He solved Ptolemy’s model by proving elliptical orbits.

4. He determined that planets move faster when closer to the Sun.

5. He discovered the laws of planetary motion.

Hence options 2,4 and 5 are the statement that shows the contribution of Johannes Kepler.

To learn more about the Johannes Kepler refer to the link;

https://brainly.com/question/247659

PLEASE HELP! 20 POINTS!


Amy and Chris took different routes to travel from Point A to Point E. Amy took the route along A, B, C, D, and E and reached the destination in 2 hours. Chris took the route along A, G, F, and E and reached the destination in 3 hours. Their routes are shown.



Which conclusion is correct?


Amy's average speed is twice Chris's average speed.

Chris's average speed is twice Amy's average speed.

Amy's average speed is equal to Chris's average speed.

Chris's average speed is three times Amy's average speed.

Answers

Answer:

Amy's average speed is equal to Chris's average speed

Answer:

im pretty sure its 'a'

Explanation:

Amy took 1 more point than Chris and reached their destination in 2 Hrs. when Chris took less and reached the destination in 3 Hrs.

see picture for visual explanation:

Use the chemical reaction to answer the question.

Answers

Answer:

60 grams

Explanation:

60gr i thinkkkkk have a good day

PLEASE HELP IF U PASS TESTS
if the same amount of heat is added to 25.0g samples of each of the metals in the chart, which metal will experience the largest temperature change?
a. calcium
b. iron
c.silver
d.gold

Answers

i think iron? i’m not 100% sure

Gold metal will experience the largest temperature change.

Explanation:

Given:

Four different metals of 25.0 gram in which the same amount of heat was added.

To find:

Which metal will experience the largest temperature change.

Solution

Consider heat added to all metals be Q and the mass of every metal is 25 grams. This means the value of temperature change will be dependent on value specific heat of metals.

The change in temperature of the substance when heat is supplied to the substance is given by:

[tex]Q=m\times c\times \Delta T\\\Delta T=\frac{Q}{mc}\\\Delta T\propto \frac{1}{c}....[1][/tex]

The above relation means that change in temperature is inversely proportional to the specific heat of the metal.

The specific heat of calcium =[tex]c_{Ca}=0.647 J/g^oC[/tex]

The specific heat of iron = [tex]c_{Fe}=0.449 J/g^oC[/tex]

The specific heat of silver = [tex]c_{Ag}=0.235 J/g^oC[/tex]

The specific heat of gold =[tex]c_{Au}=0.129 J/g^oC[/tex]

[tex]c_{Au}<c_{Ag}<c_{Fe}<c_{Ca}[/tex]

So, out of these metals, gold has the lowest value of specific heat and according to relation (1), the temperature change will be largest in 25.0 grams of gold and will be least in calcium.

The order of change in temperature of the metals will be:

[tex]\Delta T_{Au}>\Delta T_{Ag}>\Delta T_{Fe}>\Delta T_{Ca}[/tex]

Gold metal will experience the largest temperature change.

Learn more about the specific heat of substance here:

brainly.com/question/1209542?referrer=searchResults

brainly.com/question/1567572?referrer=searchResults

( please just tell me the formula to use to solve it ) A hockey puck has a coefficient of kinetic friction of μk = .10. If the puck feels a normal force (FN) of 5 N, what is the frictional force that acts on the puck?

Answers

The frictional force that acts on the puck is 0.5 N.

The given parameters;

coefficient of kinetic friction, μk = 0.1normal force of the puck, Fₙ = 5 N

The frictional force that acts on the puck is determined by taking the product of the normal force and the coefficient of kinetic friction.

The frictional force that acts on the puck is calculated as follows;

[tex]F_k = \mu_k F_n[/tex]

Substitute the given parameters in the above equation and solve the frictional force.

[tex]F_k = 0.1 \times 5\\\\F_k = 0.5 \ N[/tex]

Thus, the frictional force that acts on the puck is 0.5 N.

Learn more here:https://brainly.com/question/14955072

How does the agricultural activity most likely affect the surface water of the area?

Answers

Answer:

Agriculture has been the cause of significant modification of landscapes throughout the world. Tillage of land changes the infiltration and runoff characteristics of the land surface, which affects recharge to ground water, delivery of water and sediment to surface-water bodies, and evapotranspiration.

Explanation:

Since people throw away things like trash and some oil and other polluting stuff it polluts the ocean

Where in the eye are rods and cones located?

cornea

retina

lens

iris


WILL GIVE BRAINLIEST!

Answers

Answer:

By the Retina

Explanation:

I like your profile pic

Answer: retina

Explanation: They are located in the retina (a layer at the back of the eye).

Two laws are described below:

Law A: It can be broken under certain conditions.
Law B: It does not focus on a natural phenomenon.

Based on these characteristics, what can you conclude about Law A and Law B?

Both Law A and Law B are societal laws.
Both Law A and Law B are scientific laws.
Law A is a scientific law and Law B is a societal law.
Law A is a societal law and Law B is a scientific law.

Answers

Answer:

B is the answer. Law A is a scientific law and Law B is a societal law

Answer: Both law A and B are scientific laws

Q3. A bridge is built without expansion gaps.
Explain what could happen to the bridge if the temperature became:

a) much hotter than the day it was built.
b) much colder than the day it was built.

Explain it please

Answers

A) The bridge will expand since metal expands when heated
B) The bridge will contract since metal contract when in cool temperatures

A bridge is built without expansion gaps will expand if the temperature became much hotter than the day it was built.

A bridge is built without expansion gaps will contract if the temperature became much colder than the day it was built.

What is thermal expansion?

The expansion of any material due to the variation of the temperature is known as thermal expansion. It varied differently for different materials according to their corresponding values of the coefficient of the thermal expansion.

A bridge is built without expansion gaps will expand if the temperature became much hotter than the day it was built and it will contract if the temperature became much colder than the day it was built.

Learn more about Thermal expansion

https://brainly.com/question/14092908

#SPJ2

If engine A has more power than engine B, what does one know for sure?

Engine A is able to move a car further.

Engine B can do more work in less time.

Engine A is able to accelerate a car faster.

Engine B gets better gas mileage.

Answers

Answer:

This has a better power than engine B , you will find this engine better for in gear acceleration and overtaking manuevers also this engine will allow a higher top speed.

Explanation:

Engine A is able to accelerate a car faster .

I CAN MARK SOMEONE BRAINLIEST!!! Which of the following statements best describes the location of −(−6) on a number line?


It is 6 units to the left of 0.

It is 6 units to the right 6.

It is 6 units to the right of 0.

It is 6 units to the left of 6.

Answers

6 units to the right

Answer: GIRL/BOY HELLO AND STOP DELITING MY ANSWER ITS 6 UNITS TO THE LEFT OF 0

Explanation:

Other Questions
When Jefferson referred to unalienable rights in the Declaration of Independence, he was describing -answerF liberties belonging to all U.S. citizensG natural rights belonging to all humansH freedoms given by the local governmentJ limitations on the rights of foreign-born citizens For the following set of triangles, fill in the blanks with the correct measure. Enter your answers as number only.1) m2) m3) m4) m5) m6) m7) Segment AB = ___ units8) Segment BC = ___ units9) Segment AC = ___ units10) Segment XY = ___ units11) Segment YZ = ___ units12) Segment XZ = ___ units What trait do animals and protists have in common? A. both animals and protists are sometimes made up of many cells B. both animals and protists have cells with a nucleus C. neither animals nor protists can make their own food(Pls answer Ill mark brainliest 3. Which of the following is not proper in cleaning a stainless steelkitchen surface?A. Use a non-abrasive multi-surface cleanerB. Do not use any abrasive cream cleaners.C. Wash with a solution of washing up liquid and dry with a softclothD. To remove fingers marks, put a dab of baby oil or rinse aid on aclean cloth and rub the whole surface. the code is 338 015 9348 and the password is 3eY5FA 1. What environmental issue are you most concern about? Why?2. How can you contribute to minimize the environmental problem if not totallyprevented? What is a terminal moraine?C the area where two glaciers mergea tear-drop shaped hill left behind after a glacier has eroded an areaC deposits of rock and debris along the edges of a glacier's paththe area where a glacier finishes melting Solve for Keq , given the following concentrations at equilibrium. Based on the calculated Keq, are products or reactants larger?CO2 = 3.0 M O2 = 1.5 M CO = 2.0 M nathan packs 25 boxes in 2 hours how many can he pack in 30 min shfit In what ways did the Byzantine Empire and the Vikings influence the development of Russia? If philip's utility function is uequals12 left parenthesis q 1 right parenthesis superscript 0.5 baseline plus q 2, what are his demand functions for the two goods? Let the price of q 1 be p 1, let the price of q 2 be p 2, and let income be y. philip's demand for q 1 as a function of p 1 and p 2 is Give three examples of government control over the factors of production in a command economy. Light travels at a speed of 3.00 x 100 ^10 cm/s. What is the speed of light in kilometers/hour? Nunca te has preguntado cuantos diferentes medios de transporte tenemos en nuestros dias? Imagnate en un barcoyendo a Jamaica, o en un avin a Paris. Que te pareciera ir en tren desde Bolivia a Chile? Si te subes a un carropuedes ir a cualquier lugar del mundo. Y si no quieres gastar en gasolina, puedes ir en bicicleta a pasear por el parque.Where can you go on a !!!BIKE!!, according to the Reading Comprehension paragraph?Oto JamaicaO to South Americato the parkto school suppose you want to open a shoe company sugges names for this Pleas help I am brainliesting and show the steps Who know this for my other math these plz Read this excerpt from "Caline."The engine screeched, it sent a few lazy puffs into the still air, and in another moment or two had vanished, bearing its human cargo with it.What does the phrase "bearing its human cargo with it" mean?carrying its passengers aboardcontaining its passengers' bagsputting up with its problematic peopleholding its suitcases and packages What is an equation of the line that passes through the points (8, 2) and (-4,5)? Put your answer in fully reduced form. The temperature of air samples take. simultaneously over a large city are shown below. 22.5, 23.8, 20.2, 22.4, 23.1, 24.7, 23.7, 21.7, 21.1 Determine whether the data are qualitative or quantitative and identify the data sets level of measurement.