please help!! i’ll mark you the brainliest answer
A box of mass 4kg is being pulled along a rough surface to the right, as shown below. When F=8N, the box accelerates to the right 1m/s^2. If F is doubled to 16N, the acceleration of the box across the same rough surface will be:
A) 1m/s^2
B) 2 m/s^2
C) 3 m/s^2
D) 4 m/s^2
E) 0.5 m/s^2
Answers
Hi there!
Recall that:
∑F = ma
In the given situation, there is acceleration occurring in the horizontal direction, so there is a net force.
∑F = Fa (Force applied) - Fκ (Force due to kinetic friction)
We can plug in given values to solve for the frictional force:
ma = Fa - Fκ
(4)(1) = 8 - Fκ
4 = 8 - Fk
Fκ= 4N (negative since working opposite to acceleration)
Now, solve given the new force:
4a = 16 - 4
4a = 12
a = 3 m/s², Answer C.
Related Questions
sam can study for hours even though it is very loud and there are many possible distractions in the common room. this is an example of what?
Answers
Sam can study for hours even though it is very loud and there are many possible distractions in the common room, this is an example of a Focus system.
The focus system is a psychological intervention that is purposely designed for use at home or in lecture halls for cognitive or mental assimilation.
When the focus system takes place, an individual is able to further activate the brain networks to engage in more challenging cognitive activities despite the music, distractions, or noise from the background.
From the information given, the ability for Sam to study for hours even though it is very loud was his ability to activate his Focus System.
Learn more about Cognitive ability here:
https://brainly.com/question/18994513?referrer=searchResults
6tyhfdytythftyhyhfytfyht
Answers
Answer:
Six is the only number that is both the sum and the product of three consecutive positive numbers.
Explanation:
the amount of energy available to do work is called:
Answers
Answer:
Gibbs, free energy
Explanation:
Why can we predict the phases of the moon?
please dont search it up
Answers
Answer:
Every year, the moon moves about an inch away
What is the displacement of the object from 2 seconds to 6 seconds
•4m
•8m
•16m
•24m
Answers
Answer:
,24m bolşi
Explanation:
dfgzffdsvh466ggsceaijtgcbnmzxygdcrescdrbniuyrlohahrcwehiim
Answer:
the answer is 16 m
hope this is helpful
Write down what unit of time, you need to use for measuring
Challenging Questions
a. The beat of your heart.
b. The duration of one period of your class.
c. The time you take to travel from home to school.
Answers
Describe how a roller coaster works in terms of using potential energy and kinetic energy:
Answers
Answer:
Traditionally, the coaster cars are pulled up the first hill by a chain; as the cars climb, they gain potential energy. Then, when the cars descend this hill, potential energy is again changed to kinetic energy. This conversion between potential and kinetic energy continues throughout the ride.
Explanation: hi how ya doing
which of the following is an example of the law of multiple proportions?
Answers
The answer option which is an example of the law of multiple proportions is: B) Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C.
The Law of Multiple Proportions is also referred to as Dalton's Law and it states that when two chemical elements combine to form more than one chemical compound, the masses (weights) of one chemical element that combine with a fixed mass (weight) of the other chemical element will always be in a ratio of small whole numbers.
According to the Law of Multiple Proportions, when two chemical elements combine to form two different chemical compound, the masses (weights) of one chemical element that combine with 1 gram of the other chemical element can be expressed as a ratio of small whole numbers.
For example, carbon and oxygen react to form either carbon monoxide and carbon dioxide.
Carbon monoxide (CO):
12 grams of C = 16 grams of O.
1 gram of C = 1.33 gram of O.
Carbon dioxide ([tex]CO_2[/tex]):
12 gram of C = 32 grams of O.
1 gram of C = 2.66 gram of O.
Ratio of oxygen (O) = 16:32 = 1:2 (Law of Multiple Proportions).
Read more: https://brainly.com/question/21280037
Your question is lacking the necessary answer options, so I will be adding them here:
A. A sample of chlorine is found to contain three times as much Cl-35 as Cl-37.
B. Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C.
C. Two different samples of table salt are found to have the same ratio of sodium to chlorine.
D. The atomic mass of bromine is found to be 79.90 amu.
E. Nitrogen dioxide always has a mass ratio of 2.28 g O: 1 g N.
una fila di ballerini lunga complessivamente 2,3 m sta avvicinandosi perpendicolarmente a uno specchio. Se il primo ballerino, essendo miope, percepisce i contorni in modo nitido degli oggetti lontani al massimo 6 m, a quale distanza dallo specchio comincerà a vedere chiaramente l'ultimo ballerino della fila?
Answers
Answer:
A Benjamin Franklin
B George Washington
C Abraham Lincoln
D John Adams
If a FRAMESHIFT mutation causes a stop codon to be inserted into the DNA sequence
Answers
Answer:
The frameshift mutation will also alter the first stop codon ("UAA", "UGA" or "UAG") encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.
Explanation:
Hope it helps
por favor ayuda que ejercicio debo hacer para enflacar en una semana xd
Answers
Answer:
Un excelente ejercicio para perder barriga rápidamente es correr, ya que el cuerpo gasta una mayor cantidad de calorías en un corto período de tiempo, en tan sólo 30 minutos corriendo se queman unas 300 calorías.
...
Qué ejercicios realizar
Correr. ...
Clase aeróbica. ...
Saltar cuerda. ...
Bicicleta. ...
Caminar rápido. ...
Natación.
Explanation:
dame coronita por favor
the relative highness or lowness of a sound is called
Answers
A object was fired at 17ms at 40 degree angle horizontal , if object traveled 29meters how long was it in the air
Answers
A ball is thrown upward with an initial velocity of 22.0 m/s. If
the gravitational acceleration is –9.81 meters per second
squared, what is the maximum height the ball will reach?
Select one:
2.24 m.
24.7 m.
4.48 m.
49.4 m.
Answers
The maximum height reached by the ball during the upward motion is 24.7 m.
The given parameters;
initial velocity of the ball, u = 22 m/sThe maximum height reached by the ball is determined using the third kinematic equation as shown below;
v² = u² - 2gh
where;
v is the final velocity of the ball at the maximum height = 0h is the maximum height attained by the ball0 = u² - 2gh
2gh = u²
[tex]h = \frac{u^2}{2g} \\\\h = \frac{22^2}{2(9.8)} \\\\h = 24.7 \ m[/tex]
Thus, the maximum height reached by the ball during the upward motion is 24.7 m.
Learn more here:https://brainly.com/question/24666225
cho mạch như hình vẽ E
=
24
V
,
r
=
1
Ω
,
R
1
=
3
Ω
,
R
2
=
R
3
=
R
4
=
6
Ω
Answers
Answer:
A
Explanation:
an object at rest has no ________ energy, but it may have ________ energy resulting from its location or structure.
Answers
Answer: first blank: kinetic
Second blank: potential
Explanation:
Hope this helps and please consider choosing me for Brainiest!
PLEASE HELP I WILL MARK YOU
Scenario: On October 15, 1997, a car called
Thrust SSC set a new land-speed record. It
traveled 763 mph in 1 mile and became the first
car to officially break the sound barrier. The
Thrust SSC propels itself forward with two jet
engines made by Rolls-Royce, the same
engines found in the British version of the F-4
Phantom I fighter jet. The propulsion system
on the Thrust SSC is unique in that it does not
rely on the friction between the tires and the
ground for its forward motion. Instead, the jet
engines provide the force.
Question : Is it possible to make the Thrust SSC achieve an even higher maximum speed?
Directions: Use the information above and your
knowledge of Newton's second law of motion
to write a scientific explanation with at least
two modifications that you could make to the
car that would increase its acceleration. Be
sure to state a claim, provide mathematical
evidence (i.e. an equation or scientific
principle), and state your reasoning.
Thrust SC Specifications
Mass
10,700 kg
Maximum Speed
763 mph
Acceleration
20.8 m/s2
Fuel Burn Rate
4.8 gallons/s
Thrust Force
223,000 N
Answers
We want to see if the Trust SSC can archive a higher maximum speed.
Remember the second Newton's law:
Force = mass*acceleration.
And acceleration is the rate of change of the velocity.
Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, larger velocities can be reached.
Now there are some problems.
How we do increase the force?.
It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.
Another thing we need to remember, this velocity is measured in only one mile. So because we have a fixed distance to measure it, we only can get larger velocities by increasing the acceleration.
And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.
How to decrease the mass? Using lighter materials.
Now let's see an example on how decreasing the mass would affect the acceleration.
Mass = 10,700kgAcceleration = 20.8 m/s^2Then an aproximate force is given by:
F = 10,700kg*20.8 m/s^2 = 222,560 N
Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:
10,000kg*a = 222,560 N
a = (222,560 N)/(10,000kg) = 22.3 m/s^2
So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.
Concluding, there are two ways of increasing the maximum velocity:
Increasing the force.
Decreasing the mass of the car.
If you want to learn more, you can read:
https://brainly.com/question/12550364
Which of the following best defines the definition of a Newton (N)? *
0/1
The amount of force that would give a mass of one kilogram an acceleration of one meter per second per second
Kg * m/s².
Both answers above are correct.
A cookie with a fig fruit filling
Answers
Explanation:
The SI base units for newtons is: kg x m/s ².
When separated it is basically: the amount of force that one kilogram multiplied by one meter per second squared (this is the acceleration)
One Newton can be defined as the amount of force that would give a mass of one kilogram an acceleration of one meter per second per second.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
From Newton's second law of motion: we know that:
Force = mass × acceleration
Now in SI system:
Unit of force is Newton.
Unit of mass is kg and unit of acceleration is meter per square second.
Hence, one Newton force can be defined as:
The required force to generate 1 meter per square second acceleration on an object of mass one kilogram.
Learn more about force here:
https://brainly.com/question/13191643
#SPJ6
What is the magnitude of the force that is exerted on a 15 kg mass to give it an acceleration of 5.0 m/s/s?
Answers
15•5= 75
Can someone please give me the answers to this? ... please ...
Answers
Answer:
See below:
Explanation:
What you have done seems to be correct, what we can do is just add a box into the center. For the 3rd question, we can just draw a box as nothing is happening. That is all!
Consider marking as brainliest if it helped!
Answer:
Explanation:
good luck
i think
How long would it take a message sent as radio waves from earth to reach mars?
Answers
Answer:
[tex]longest \: dstance \: btw \: earh - mars \\ (150 + 230) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{380 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } \\ \\ when \: mars \: is \: close \: to \: earth \\ ( 230 - 150) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{80 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } [/tex]
Molly does not have many activities after school, so she has plenty of time to exercise. She has never been very athletic and plans to start by exercising two hours a day five days a week. Is this a good plan?
OPTIONS:
A.
Yes, she should dive right in.
B.
No, no one can exercise that much.
C.
Yes, if she has the time there is no excuse.
D.
No, smaller goals would be better.
PLEASE NO LINKS
Answers
a.
In what ways do human beings contribute to the greenhouse effect? Select all that apply.
by using renewable energy
b. by driving gas -powered cars
by studying extreme weather events
d. by making things out of plastic
C.
Answers
an engineer is developing a conveyor belt to help move heavy boxes in factories. The device should be able to move boxes from the first floor to the second floor of a factory. The engineer is building a full- sized model to test her design.
Answers
Answer:
This conveyor belt should be connected to fixed pulleys in case their total effort is less than the load. But if it's not that, the belt should be connected to movable pulleys.
Explanation:
[tex].[/tex]
Answer:
this conveyer belt should be connected to fixed pulleys in case their total effort is less than the load . but if it's not that the belt should be connected to movable pulleys
10. Analyze What is the wavelength of these waves?
Answers
Answer:
Wavelength is the distance between the two closest points that are in phase with each other along a wave.
Explanation:
How does the spring constant influence the displacement? Do they increase or decrease together?
Trial No. Applied Force (N) Displacement is attached (m)
1. 50 N 0.500m
2. 50 N 0.167m
3. 50 N 0.100m
4. 50 N 0.071m
Answers
Explanation:
I have asked question in my profile please tell me the answer
According to the nebular theory, what early event eventually led to the formation of our solar system?
Answers
Answer:Solar system formed about 4.6 billion year ago, when gravity pulled together low-density cloud of interstellar gas and dust (called a nebula)(movie). The Orion Nebula, an interstellar cloud in which star systems and possibly planets are forming. Initially the cloud was about several light years across.
Explanation:
the circular disk rotates about its center. for the instant represented, the magnitude of velocity of a is 8 ft/s and the magnitude of tangential acceleration of b is 9 ft/s2. what is the magnitude of the acceleration of point a?
Answers
Answer:ddddddddddddddd
Explanation:
online masses every 8 a.m. and 2:00 p.m. will continue
Answers
online is hard toooooooooo
what is gravitional force?
Answers
Answer: Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
Explanation:
Answer:
the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface is called as gravitation or gravitational force.
Explanation:
brainliest plz