Answer:
F = 9.81 [N]
Explanation:
To solve this problem we must use Newton's third le which tells us that the sum of forces on a body that remains static must be equal to one resulting from these forces in the opposite direction.
Let's perform a summation of forces on the vertical axis-y to determine the normal force N.
∑F = 0 (axis-y)
[tex]N - m*g = 0[/tex]
where:
m = mass = 4 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N - (4*9.81)=0\\N = 39.24 [N][/tex]
Now we know that the frictional force can be calculated using the following equation.
f = μ*N
where:
f = friction force [N]
μ = friction coefficient = 0.25
N = normal force = 39.24 [N]
Now replacing:
[tex]f = 0.25*39.24\\f = 9.81[N][/tex]
Then we perform a sum of forces on the X-axis equal to zero. This sum of forces allows us to determine the minimum force to be able to move the object in a horizontal direction.
∑F = 0 (axis-x)
[tex]F-f=0\\F-9.81=0\\F= 9.81[N][/tex]
If the coefficient was smaller, a smaller force (F) would be needed to start the movement, this can be easily seen by replacing the value of 0.25, by smaller values, such as 0.1 or 0.05.
If the coefficient were larger, a larger force would be needed.
"El sujeto es emergente de la compleja trama de relaciones vinculares e institucionales que lo determinan. En esa trama, las relaciones tempranas adquieren un lugar fundamental en los procesos de constitución subjetiva" Terigi, Flavia (2010) Sujetos de la Educación. Para el psicoanálisis, ¿cuáles serían esas relaciones tempranas y por qué se afirma que son fundamentales en los procesos de constitución subjetiva?
La respuesta correcta para esta pregunta abierta es la siguiente.
Para el psicoanálisis, las relaciones tempranas son las relaciones a posteriori entre los padres del recién nacido y el bebé mismo. Estas relaciones son fundamentales en los procesos de constitución subjetiva para el discurso parental para entender los aspectos del desarrollo infantil y sus diferentes estados o teorías de desarrollo para ir comprendiendo cada aspecto de la interrelación y el comportamiento entre las partes.
Para el psicoanálisis, el recién nacido está llegando a un núcleo familiar que ya está establecido y se basa en conocimientos, tradiciones y experiencias de los padres que han recibido de generaciones anteriores, y éstas van a influir directamente en la interrelación permanente con los primeros años del crecimiento del bebé.
Science: Please help me with this due in 5 minutes
Answer: Use less water
only turn on lights when needed
electrical cars
less gas usage
Explanation:
Which of the following do you NOT need a college education for?
personal trainer
physical therapist
nutritionist
teacher
The type of profession that does not need a college education is personal trainer.
Which profession does not need a college education?Personal trainer is the type of profession that does not need a college education because the personal trainer is not related to any educational subject. This profession can be learned from a trainer not from the teacher in the school or college. Personal trainer is responsible for maintaining the strengths and remove the weaknesses through creating workout plans. It provides physical and mental guidance and also monitor progress of their customer on a regular basis..
So we can conclude that the type of profession that does not need a college education is personal trainer.
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Plz answer all 5 of the questions i will give brainlyest
1.What is force?
2.Relate force and motion.
3.What forces control the motion of everyday objects?
4.Identify and define the SI unit for force.
5.Draw a diagram to represent a foot kicking a resting soccer ball. Use arrows to represent the force applied to the ball and to show how the ball moves after it is kicked.
Answer:
1)force:- force is an external affert by any body on an object.
2) force and motion are related to each other. force helps to create motion in any object.
3) frictional force
4) Newton
the magnitudes of 2 vectors a and b are 12 units and 8 units respectively. what are the largest and smallest possible values for the magnitude of the resultant vector r
When vector A is oriented in the same direction as vector B, the resultant's greatest magnitude is A + B = 12 + 8 = 20 units. When vector A is oriented in the direction opposite to vector B, the resultant vector has its least magnitude, A - B = 12 - 8 = 4 units.
What is a resultant vector?A vector that produces the aggregate impact of all other vectors is known as a resultant vector. The resultant vector is what we get when we combine two or more vectors. The head-to-tail convention, which is defined as "joining the tail of the first vector with the head of the second vector to give another vector whose head is joined with the head of the second vector and tail of the first vector," can be used to geometrically add vectors by drawing them on a common scale.
Any number of vectors can be added by extending the procedures for obtaining a vector's resultant or adding more than two vectors.
R=A+B+C---
Assume there are three vectors: A, B, and C. These vectors must be drawn in accordance with the head-to-tail rule so that the heads of each vector line up. As a result, the resultant vector is as follows:
R=A+B+C
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If car is going at a speed of 80 km/h how far will it travel in two hours
Answer: 160 km
Explanation:
"Consiousness is everything. It is the learning instrument that takes effort. The benefits are extreme. When you change your consciousness you change your world, and when you change your world, you change the world. It's as simple as that and it's profound." What does this mean in 1 paragraph?
"Consciousness is everything. Consciousness and "conscious" are catch-all terms that refer to a wide range of mental events. Both have a variety of connotations, and the word "conscious" is used to describe both specific mental states and processes (state consciousness) as well as entire creatures (creature consciousness).
Your distinctive awareness of your own thoughts, memories, emotions, sensations, and surrounds is what is known as consciousness. Being aware of oneself and one's surroundings is the essence of consciousness.
This awareness is personal to you and subjective. It is a sign that something is a part of your consciousness if you can verbalize what you are experiencing.
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Using the "Rube Goldberg" machine image below, identify the correct simple machine used in this complex machine.
Answer:
c is the correct answer
Explanation:
A Rube Goldberg Machine is “a comically involved, complicated invention, laboriously contrived to preform a simple operation.” 2. What are the 6 Simple Machines? A. The 6 Simple Machines are: wedge, screw, lever, wheel and axel, inclined plane and pulley
Answer: it’s actually A
Explanation:
Anything sharp like a knife, is a wedge so the hook thingy is a wedge
PLEASE HELP ME
Imagine a metal cooking pan with a wooden handle is placed into a 200 °c oven.
Which material (wood or metal) would reach thermal equilibrium most rapidly? Why?
Answer:
The pan because it is directly on there to absorb heat while the handle is there more towards the end and will have heat reaching the start of the handle while the metal is already hot
Which two factors affect the amount of thermal energy an object has?
What does a step down transformer change in an alternating current
The step down transformer decrease the incoming current's voltage.
Transformers go with the principle of mutual inductance . A changing magnetic field in one circle of wire actuates an electromotive force (EMF) in an adjoining circle of wire, inductively coupled to the primary. In exceptionally fundamental terms, a transformer comprises two coils of wire with tall shared inductance. These coils are electrically isolated whereas they share a common magnetic circuit. In a step-down transformer, there is a decrease in the incoming current’s voltage, where the primary voltage is the incoming voltage whereas the outgoing voltage is considered the secondary. the second coil has fewer windings than the primary, permitting a decrease in voltage within the exiting electrical stream. The primary winding, which is the primary set of coils, interfaces to an alternating-current voltage source, or primary voltage influx. The secondary coil interfaces to the stack, or secondary voltage outpouring, conveying the electrical control absent from the transformer. The substituting current streaming in at the primary voltage makes a substituting magnetic flux. This actuates a similar current within the secondary coil, making a secondary voltage. Here, the diminished number of windings within the secondary coil successfully diminishes the resultant voltage, subsequently “stepping down” the voltage to a lower value whereas keeping up a steady frequency.
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Lab report 1.04 hypothesis
Answer:a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Hope This helps!!
a plane flew for 2 hours at 467 mph
Answer: Plane flew 3,614 miles
Explanation: = (2 × 467) + (5 × 536)=3, 614 miles.
Hope this helps!!! Brainlist? plz
a vertical spring oscillates with a frequency of 3.0 hz when a 0.60 kg mass is hung from it. determine the frequency when only a 0.38 kg mass hangs from it.
By angular speed, the frequency is 2.39 Hz.
We need to know about the angular speed of harmonic oscillation. the angular speed can be determined as
ω² = k / m
where ω is angular speed, k is spring constant, and m is the mass.
The angular speed can be calculated by
ω = 2πf
Hence,
ω² = k / m
(2πf)² = k / m
k = (2πf)² / m
where f is frequency.
From the question above, we know that:
m1 = 0.6 kg
f1 = 3 Hz
m2 = 0.38 kg
The spring is same, hence the spring constant is the same
k1 = k2
(2πf1)² / m1 = (2πf2)² / m2
f1² / m1 = f2² / m2
3² / 0.6 = f2² / 0.38
f2² = 5.7
f2 = 2.39 Hz
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PLS HELP ILL GIVE BRAILIEST + 20 PTS
What is the displacement of a car which travels at a steady velocity of
60 km/h
(a) for 3 h
(b) for 1/2 h?
Answer:
(a) 180 km
(b) 30km
Explanation:
To find displacement (in this case, kilometers) you need to convert km/h to km, this can be done by multiplying by the amount of hours:
[tex]\frac{60km}{h}*3h=60km*3=180km \\\frac{60km}{h} *h/2 = 60km/2=30km[/tex]
(The h/2 term came from 1/2*h, since half an hour is h*1/2)
What is the SI unit for capacitance?
O farad (F)
O volt (V)
O joule (J)
O ampere (A)
The capacitance value of a capacitor is measured in farads (F)
The SI unit for capacitance is referred to as Farads.
What is Capacitance?This is the ability of a device or circuit to store energy which is usually in
the form of electric charges.
A capacitor on the other hand is the device which performs this function.
The formula for determining capacitance is denoted below:
C = q/V where C is capacitance, q is charges and V is voltage.
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Need help quick!!!!
When trying make an object accelerate, what kind of Net force is required?
A. Balanced Force
B. Unbalanced Force
C. Force of Friction
D. Normal Force
if you know how to SHiFT in sleep how do you do it
Kiana is wearing a black shirt and shiny necklace. While she is outside at recess her shirt absorbs the light waves and gets very hot in the sun, but her necklace reflects the light waves and small circles of light are seen around the yard. What explains why the light waves behaved differently on her shirt than they did on her necklace?
Answer:
Black bodies are good absorber of light waves from the sun, while shining surfaces are good reflector of the light waves.
Explanation:
Generally, a black surface or material tends to absorb light waves while under the sun, while a shiny surface is a good reflector of the waves. This is because the black material is a good absorber, and also a good emitter.
The shiny necklace can only absorb little light waves from the sun, thus it reflects most of the light waves. The reflection is the reason for the small circles of light seen around the yard.
However, when in a cool environment the black shirt would cools faster (good emitter) than the shiny necklace.
What is the main difference between primary and secondary succession?
A The climax of primary succession is pine forest
B Primary succession begins with bare rocks
C Secondary succession begins with mossed and lichens
D Secondary succession include frequent fires
Answer:
b
Explanation:
How can you determine the qualitative relationship that may exist in a set of
data?
WILL MARK BRAINLEST
Answer:
Qualitative research can identify key variables in which regards as findings. Such findings may put into a conceptual framework or a research framework, later stage, that research framework can be tested via various statistical methods such as correlation, structural equation modelling ect. Because, qualitative research do not prove any significant relationship among variables, but quantitative research do. However, based on data gathered in qualitative research, the researcher can show that there may have some relationships among variables through graphically or by using NVivo qualitative data analysis software.
Explanation:
creds to Roshan Panditharathna
You can determine the qualitative relationship that may exist in data because qualitative describes key qualities and characteristics using questionnaires, observation or interviews. On the other hand quantitative relationships are based off of numbers and are collected using graphs and charts.
A uniformly charged, straight filament 7.00m in length has a total positive charge of 2.00μC. An uncharged card-board cylinder 2.00cm in length and 10.0cm in radius surrounds the filament at its center, with the filament as the axis of the cylinder. Using reasonable approximations, find (a) the electric field at the surface of the cylinder
The electric field at the surface of the cylinder is 51428V/m
Given data:
• The length of the charge is l= 7m.
• The charge is q = 2μC..
• The radius the cylinder is r = 10 cm
Since the filament length is so large as compared to the cylinder length that the infinite line of charge can be assumed.
The expression to calculate the electric field is given as,
E=2kλ/r
Here, λ is the linear charge density.
Substitute the values in the above equation,
E = (2×9×109N⋅m^2/C^2×2×10^−6C)/0.1m×7m
E = 51428N/C×(V/m)/(N/C)
=51428V/m
An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. Matter is positively charged if it contains more protons than electrons, and negatively charged if it contains more electrons than protons.
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A machine does 500 j of work in 20 sec. What is the power of this machine?
Explanation:
P=W/t
P=500/20
P=25 W
Solenoid A has length L and N turns, solenoid B has length 2 L and N turns, and solenoid C has length L / 2 and 2 N turns. If each solenoid carries the same current, rank the magnitudes of the magnetic fields in the centers of the solenoids from largest to smallest.
Rank of the magnitude of the magnetic fields in the centers of the solenoid from largest to smallest is,
[tex]B_{C}\; > B_{A}\; > B_{B}[/tex]
We know that, Magnetic field is directly proportional to Turns (N) and inversely proportional to Length (L) of the solenoid.
[tex]B \propto\frac{N}{L}\;\;\;\;\;------ equation(1)[/tex]
For Solenoid A,
[tex]Length\;(L) = L[/tex]
[tex]Turns\;(N)=N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{A} =\frac{N}{L}[/tex]
For Solenoid B,
[tex]Length\;(L) = 2\;L[/tex]
[tex]Turns\;(N)=N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{B} =\frac{N}{2L}[/tex]
[tex]B_{A} =\frac{1}{2}\;\frac{N}{L}[/tex]
For Solenoid C,
[tex]Length\;(L) = \frac{L}{2}[/tex]
[tex]Turns\;(N)=2N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{C} =\frac{2N}{\frac{L}{2} }[/tex]
[tex]B_{C} =\frac{4N}{L}[/tex]
Describe the magnetic field?The magnetic influence on moving electric charges, electric currents and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons.
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What is the weight of a person who has a mass of 60 kg
Answer:
Depends on the grativy of the planet. On Earth is 600 Newtons
Explanation:
W = M . G
W = 60 . 10
W = 600
Why should you care
about air masses?
Explanation:
because
1.Extremely warm masses can lead to heat waves
2.Extremely cold air masses can be just as deadly and costly
3.The"clashing "of different air masses can produce regions of severe weather
A) a 70 kg runner begins his slide into third base moving at a speed of 4 m/s. How much work does friction do to slow him down as he slides into third base?
B) If the runner slides for 2 m, what is the force of friction between the player and the ground?
Answer: I don’t know the answer to this but just do what i do look up the question I’m sure someone has answered this hope it helps❤️
Explanation:
Heat transfers through Earth's systems in different ways. In which atmospheric action can we see evidence of conduction? Cold air pushes warm air upward, creating a current. Cold air pushes warm air upward, creating a current. The surface of the Earth heats the air that contacts it. The surface of the Earth heats the air that contacts it. Radiation from the Sun heats the surface of the Earth. Radiation from the Sun heats the surface of the Earth. Air increases in density and sinks back towards the Earth.
Answer:
B. The surface of the Earth heats the air that contacts it.
Explanation:
Conduction is a mode of heat transfer in which energy is transferred from a hot molecule to the neighboring molecules due to contact. Thus, heat energy is transferred from one molecule to another in the process.
Therefore, the air that comes in contact with the surface of the earth heats up by conduction. Since the surface of the earth is heated up due to the radiation from the Sun.
Answer: B.
Explanation: I took the test. Also, after my diagnostic I just wanted to see if my answers were correct lol.
can any one give me a amazon code i will repay you. plz i am trying to buy my mom somin off amazon
Answer:i have none but good luck also this is a learning site ;-;
Explanation:
According to Newton’s first law of motion, which of the following objects will change its motion?
A.A train pulling on another train, each with the same amount of force.
B.A bike rider on a smooth and level road, pedaling at a constant rate.
C.A chair sitting on the floor with balanced forces acting in opposite directions.
D.A ball rolling across the floor with friction acting in the opposite direction.
A ball rolling across the floor with friction acting in the opposite direction.
Answer:
D.
Explanation:
the friction will cause the ball to stop moving which is a change