as a 4.4-kg object moves from (2 i 5 j) m to (6 i - 2 j) m, the constant resultant force acting on it is equal to (4 i - 3 j) n. if the speed of the object at the initial position is 4.9 m/s, what is the work done by the force, and what is its kinetic energy at its final position? as your answer in canvas, write the kinetic energy in joules.\
Answers
The kinetic energy of the object at its final position is 90.98 J.Given,Mass, m = 4.4 kg Initial position, r1 = (2 i + 5 j) m, Final position, r2 = (6 i − 2 j) m ,Initial velocity, u = 4.9 m/s ,Constant resultant force, F = (4 i − 3 j) N .To find the work done by the force,First, we need to find the displacement vector = r2 - r1= (6 i − 2 j) - (2 i + 5 j)= (6 - 2) i + (-2 - 5) j= 4 i - 7 j
Magnitude of the displacement vector,= √(4² + (-7)²)= √65 m Now, we can find the work done by the force,W = F.s= (4 i - 3 j) . (4 i - 7 j)= 4(4) + 3(7)= 37 J
Therefore, the work done by the force is 37 J.
To find the kinetic energy of the object at its final position,First, we need to find the final velocity of the object by using the work-energy principle.Initial kinetic energy, K1 = (1/2)mu²= (1/2) × 4.4 × (4.9)²= 53.98 J
Work done by the force, W = 37 JFinal kinetic energy, K2 = K1 + W= 53.98 + 37= 90.98 JTherefore, the kinetic energy of the object at its final position is 90.98 J.
For such more questions on displacement
https://brainly.com/question/28952425
#SPJ11
Related Questions
How far should flammable material be kept from electrical panels?
Answers
WHAT IS THE ANSWER PLS LMK TYY
Answers
You are asked to determine the identity of an unknown liquid and can measure only one physical property. You hear the liquid and record that the liquid turns into vapor at 100°C.
Which physical property does this demonstrate?
A. Melting point
B. Boiling point
C. Ability to conduct electricity
D. Meltability
Answers
The answer is The boiling Point as the transition from liquid to gas occurs at the boiling point.
The actuality that it changes from liquid to vapor indicates that you are working with the substance's boiling point.
The material is pure if its temperatures does not change when it turns phases. Since water turns liquid at 100°C in this situation, water is likely the culprit.
The temperature at which a specific liquid will boil is known as its boiling point. For instance, water reaches its boiling point at 1 atm, or 100 degrees Celsius. The temperature of the liquid, the pressure of the atmosphere, and the pressure of the vapor all affect its boiling point.
Learn more about boiling point here
https://brainly.com/question/40140
#SPJ1
A B-52 bomber jet flies at a horizontal velocity of 286.2 m/s and at an altitude of 7500 m above the ground. How far away horizontally should a payload be dropped to land on a target?
Answers
Answer:
11196.14 m
Explanation:
From the question given above, the following data were obtained:
Horizontal velocity (u) = 286.2 m/s
Height (h) = 7500 m
Horizontal distance (s) =?
Next, we shall determine the time taken for the payload to get to the target. This can be obtained as follow:
Height (h) = 7500 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
7500 = ½ × 9.8 × t²
7500 = 4.9 × t²
Divide both side by 4.9
t² = 7500 / 4.9
Take the square root of both side
t = √(7500 / 4.9)
t = 39.12 s
Finally, we shall determine the horizontal distance as follow:
Horizontal velocity (u) = 286.2 m/s
Time (t) = 39.12 s
Horizontal distance (s) =.?
s = ut
s = 286.2 × 39.12
s = 11196.14 m
Thus the payload will travel 11196.14 m horizontally in order to hit the target
Pe un reostat sunt scrise valorile R=220 Ω, I=0,8A. Poate fi legat acest reostat la o priza de 220V?
Answers
Answer:
di ko alam eh sorey
Explanation:
di ako maalam sa ganyan
How is the law of conservation of momentum be displayed Rugby
The speech should be 3–5 minutes in length.
The speech should consist of three parts: an introduction of the topic, a body (including the
demonstration), and a conclusion to wrap it all up.
Include information about the following:
Momentum and impulse
How momentum and impulse are present in the sport
How conservation of energy is present within the sport
Will give brainliest
Answers
Today, I want to talk to you about the law of conservation of momentum and how it applies to the sport of Rugby.
First, let's define momentum and impulse. Momentum is a measure of the motion of an object, calculated by multiplying its mass and velocity. Impulse is the change in momentum that results from a force acting on an object for a certain amount of time.
Now, let's think about how momentum and impulse are present in Rugby. During a Rugby match, players are constantly running, tackling, and passing the ball. Each of these actions involves a transfer of momentum from one player to another. When a player runs with the ball, for example, they have momentum that is transferred to the ground. When they tackle an opposing player, they apply an impulse that changes the momentum of that player.
The conservation of energy is also present within Rugby. This law states that the total energy of a closed system remains constant over time. In Rugby, the players and the ball make up a closed system. The energy of the system is conserved as players pass the ball back and forth, run with the ball, or tackle each other.
Now, I want to demonstrate how the law of conservation of momentum works in Rugby. I have here a small Rugby ball and two equally weighted balls, one blue and one red. If I drop the Rugby ball onto the blue ball, the momentum of the Rugby ball is transferred to the blue ball, causing it to move. If I drop the Rugby ball onto the red ball, the momentum is transferred to the red ball, causing it to move instead.
This demonstration shows how the momentum of one object can be transferred to another object when they collide. In Rugby, this happens when players tackle each other or when they pass the ball.
In conclusion, the law of conservation of momentum plays a crucial role in the sport of Rugby. As players run, tackle, and pass the ball, they transfer momentum from one object to another. The conservation of energy is also present within the sport, as the total energy of the closed system of players and ball remains constant. Thank you for listening.
Question 2
Points 2
A 7.5 kg bowling ball, initially at rest, is dropped from the top of an 11 m building. It
hits the ground 1.5 s later. Find the net external force on the falling ball.
110 N
R
CO
Answers
Answer:
Approximately \(73\; {\rm N}\), assuming that the acceleration of this ball is constant during the descent.
Explanation:
Assume that the acceleration of this ball, \(a\), is constant during the entire descent.
Let \(x\) denote the displacement of this ball and let \(t\) denote the duration of the descent. The SUVAT equation \(x = (1/2)\, a\, t^{2}\) would apply.
Rearrange this equation to find an expression for the acceleration, \(a\), of this ball:
\(\begin{aligned} a &= \frac{2\, x}{t^{2}}\end{aligned}\).
Note that \(x = 11\; {\rm m}\) and \(t = 1.5\; {\rm s}\) in this question. Thus:
\(\begin{aligned} a &= \frac{2\, x}{t^{2}} \\ &= \frac{2 \times 11\; {\rm m}}{(1.5\; {\rm s})^{2}} \\ &\approx 9.78\; {\rm m \cdot s^{-2}}\end{aligned}\).
Let \(m\) denote the mass of this ball. By Newton's Second Law of Motion, if the acceleration of this ball is \(a\), the net external force on this ball would be \(m\, a\).
Since \(m = 7.5\; {\rm kg}\) and \(a \approx 9.78\; {\rm m\cdot s^{-2}}\), the net external force on this ball would be:
\(\begin{aligned} (\text{net force}) &= m\, a \\ &\approx 7.5\; {\rm kg} \times 9.78\; {\rm m\cdot s^{-2}} \\ &\approx 73\; {\rm kg \cdot m \cdot s^{-2} \\ &= 73\; {\rm N} && (1\; {\rm N} = 1\; {\rm kg \cdot m\cdot s^{-2}}) \end{aligned}\).
In Cathode Ray Oscilloscope (CRO), if plates for vertical deflection are removed then what will be the wave pattern on the fluorescent screen?
Answers
Answer:
the waves will appear horizontally on the florescent screen because the y-plates have been removed
Without the plates for vertical deflection, the CRO will only display the horizontal waveform on the fluorescent screen, with no vertical deflection.
What is CRO?CRO stands for Cathode Ray Oscilloscope. It is an electronic instrument used for visualizing and measuring various electrical and electronic waveforms. It works by displaying a graph of voltage versus time on the screen. This graph is generated by deflecting a beam of electrons, known as the cathode ray, across a screen coated with a phosphorescent material that emits light when struck by the electrons. The horizontal axis of the screen represents time, while the vertical axis represents the amplitude of the signal being measured. CROs are widely used in electronic engineering, telecommunications, and other fields for testing and analyzing signals.
Here in the Question,
If the plates for vertical deflection are removed in a Cathode Ray Oscilloscope (CRO), then the wave pattern on the fluorescent screen will be a straight line, with the height of the line depending on the voltage applied to the horizontal deflection plates.
This is because the CRO uses an electron beam to display the waveform of an electrical signal on a fluorescent screen. The electron beam is directed towards the screen by the deflection plates, which are typically placed perpendicular to each other.
When a voltage is applied to the vertical deflection plates, the electron beam is deflected vertically, resulting in a waveform on the screen. If the vertical deflection plates are removed, the electron beam will not be deflected vertically and will travel in a straight line towards the screen.
However, if a voltage is applied to the horizontal deflection plates, the electron beam will be deflected horizontally, resulting in a waveform that is displayed horizontally on the screen. The height of the waveform will be determined by the voltage applied to the horizontal deflection plates.
Therefore, without the plates for vertical deflection, the CRO will only display the horizontal waveform on the fluorescent screen, with no vertical deflection.
To learn more about electromagnetic radiation click:
https://brainly.com/question/10759891
#SPJ3
What is a good question to ponder/Think about ?
Answers
Explanation:
how to alweays win amoung us_
A car with a mass of 1600 kg is towing a trailer with a mass of 420 kg. The car
provides a forward thrust of 3300 N. What is the acceleration of the trailer?
Answers
Answer:
1.63366
Explanation:
I got this answer from calculator soups physics calculators. I really recommend their website for formulas.
Can someone help me plz
Answers
There are three stars which are all at the same distance and are the same size. Star A is 5000 degrees,
star B is 8000 degrees and star C is 10,000 degrees. Which is brightest?
Answers
Answer:
Star C
Explanation:
The more heat/energy the more the luminosity.
Which part of a star extends millions of kilometers into space? A. chromosphere B. corona C. photosphere D. radiative zone
Answers
The correct answer is
B. corona.
The corona is the outermost layer of a star's atmosphere and extends millions of kilometers into space.
It is composed of extremely hot plasma and is most easily observed during a total solar eclipse when it appears as a faint, pearly-white glow surrounding the darkened disk of the Moon. The other options mentioned are also parts of a star, but they do not extend to the same distances as the corona.
Hot plasma is a state of matter in which particles, such as electrons and ions, are so energized that they become completely or partially ionized. Plasma is often referred to as the fourth state of matter, in addition to solid, liquid, and gas. It is characterized by its ability to conduct electricity and respond to magnetic fields.
When a substance is heated to high temperatures, the thermal energy causes the atoms or molecules to move rapidly, eventually leading to the breaking of chemical bonds. In the case of plasma, the extreme heat causes the atoms to lose electrons, resulting in a mixture of positively charged ions and negatively charged electrons. This ionization process gives rise to a highly conductive medium with unique properties.
Plasmas can be found naturally occurring in phenomena such as lightning, the Sun's corona, and certain types of flames. They can also be created in laboratory settings using various methods, including heating a gas to high temperatures, subjecting it to strong electromagnetic fields.
To know more about corona - outermost layer of a star's atmosphere, visit
https://brainly.com/question/1486648
#SPJ11
The equivalent resistance of a complex circuit is usually determined by a dividing the sum of the individual resistances by the number of resistances. b adding and subtracting individual resistances. c inspection. d simplifying the circuit into groups of series and parallel circuits.
Answers
Answer:
d
Explanation:
we simplify the circuit into groups to obtain a complete circuit I.e series and parallel circuit
The following table contains the applied forces and corresponding extension of a perfect spring. Determine the spring stiffness. Provide your answer in N/m to 4 decimal places. X (m) F (N) 0. 43 59. 34 0. 52 71. 76 0. 57 78. 66 0. 74 102. 12 0. 81 111. 78 0. 88 121. 44 0. 96 132. 48 Answer:
Answers
The spring stiffness, or spring constant, of the given perfect spring is approximately 137.9623 N/m. This means that for every meter of extension, the spring will exert a force of 137.9623 N.
This value was obtained by applying Hooke's Law and calculating the ratio of the change in force to the change in extension using two data points from the table.
To determine the spring stiffness, we need to calculate the spring constant (k) using Hooke's Law, which states that the force applied on a spring is directly proportional to the extension it undergoes.
Hooke's Law can be represented as F = kx, where F is the applied force and x is the extension of the spring.
In the given table, we have the applied forces (F) and corresponding extensions (x). We can use any two data points from the table to find the spring constant.
Let's choose the first and last data points from the table:
(x1, F1) = (0.43 m, 59.34 N) and (x2, F2) = (0.96 m, 132.48 N).
Using Hooke's Law, we can calculate the spring constant (k) as follows:
k = (F2 - F1) / (x2 - x1)
= (132.48 N - 59.34 N) / (0.96 m - 0.43 m)
= 73.14 N / 0.53 m
≈ 137.9623 N/m (rounded to 4 decimal places)
Therefore, the spring stiffness, or spring constant, is approximately 137.9623 N/m.
Hooke's Law is a fundamental concept in physics that describes the relationship between the force applied on a spring and the resulting extension it undergoes.
The formula F = kx represents this relationship, where F is the applied force, k is the spring constant, and x is the extension of the spring.
By using two data points from the table, we can calculate the spring constant by finding the ratio of the change in force to the change in extension.
This calculation allows us to quantify the stiffness of the spring.
To know more about force visit;
https://brainly.com/question/13191643
#SPJ11
ii) One of the containers is wide and shallow. The other container is narrow and deep
Predict which container has the greater rate of cooling. Explain your answer.
Answers
a plane flies 400 km east from city a to city b in 45.0 min and then 980 km south from city b to city c in 1.50 h. (assume the x axis points east and the y axis points north.) (a) in magnitude-angle notation, what is the plane's displacement for the total trip?
Answers
The plane's displacement for the total trip is, -63.2°.
Velocity, v = x/t
Vx = 459 km/2.483 hr = 184.8 km/h
Vy = -909 km/2.483 hr = - 366 km/hr
Magnitude, v =sqrt(Vx^2 + Vy^2) = 410 km/hr
Direction, theta = arctan (-366/184.8) = - 63.2°
What is in plane displacement?Double symmetrical illumination of the object, successively for each illumination direction, is used to measure in-plane displacement as the loading is gradually increased. The impact response of structures is significantly impacted by the in-plane displacements at the supports.
This is so that axial membrane forces along the beam's center line can be introduced by the development of geometrical modifications. Given that the double-hull specimen should have been strengthened by sturdy brackets at the boundaries of the outer and inner plates, this anomaly is likely the result of insufficient experimental restrictions (top and bottom plates).
To learn more about plane displacement, visit:
https://brainly.com/question/13066887
#SPJ4
A ball is dropped from a height of 20 meters. At what helght does the ball have a velocity of 10 meters/second?
Answers
Answer:
5.10 meters.
Explanation:
v²=u²+2gh
or, (10)²=(0)²+2×9.8×h
or, 19.6h=100
or, h=5.10 meters
Hope, this helps you.
20 points+ Brainliest
A sturdy metal cylinder used for scuba diving is filled with air. The air in the cylinder is heated but the gas is not able to expand. Which type of process has occurred?
A. Isobaric
B. Isothermal
C. Isochoric
D. Adiabatic
Answers
Answer:
The answer is B. hope this helps
Explanation:
Which Si unit would be most appropriate for measuring the length of a
hand?
A. Millimeters
B. Kilometers
C. Kilograms
D. Milliliters
Answers
Answer:
A. Millimeters
Explanation:
C. is a unit of weight-wrong
D. is a unit of volume-wrong
B .kilometers are too large
Answer: A. Millimeters
Explanation:
Because it is more reasonable
Walt ran 5 kilometers in 25 minutes going eastward what is his average velocity
Answers
Answer:
1/5 km/min
Explanation:
the formula for velocity is distance/time
so if i plug in the distance and time i get 5/25 or 1/5
Hope this helps!
What are the positive and negative impacts of technology on the environment?
Answers
Answer:
Explanation:
Technology has both positive and negative impacts on the environment. Here are some examples of each:
Positive impacts:
Increased energy efficiency: Advances in technology have led to the development of more energy-efficient appliances, vehicles, and industrial processes, reducing energy consumption and greenhouse gas emissions.
Renewable energy: Technology has enabled the development of renewable energy sources such as wind and solar power, reducing our dependence on fossil fuels and reducing the impact of energy production on the environment.
Improved waste management: Technological innovations have improved waste management practices, making it easier to recycle and reduce waste.
Enhanced communication and transportation: Technology has improved communication and transportation, making it easier to access information and resources, reducing the need for travel, and minimizing the environmental impact of transportation.
Negative impacts:
Resource depletion: Technology often requires the extraction and use of natural resources such as minerals, oil, and gas, leading to resource depletion and environmental degradation.
Electronic waste: The increasing use of electronic devices has led to a growing problem of electronic waste, which can contain toxic materials and harm the environment if not disposed of properly.
Climate change: Some technologies, such as fossil fuel-based energy production and transportation, contribute significantly to climate change through the release of greenhouse gases into the atmosphere.
Habitat destruction: The development of technology and infrastructure often requires the destruction of natural habitats, leading to the loss of biodiversity and disruption of ecosystems.
Overall, technology has the potential to have both positive and negative impacts on the environment, and it is important to consider these impacts when developing and using technology in a way that is sustainable and equitable.
Please, help me!!! It's due today!!
Answers
Answer:
The question is incomplete.
It asks you to use the formula W = F * D (force times distance)
But the question only gives the work W in joules.
You would need to know the weight of the object to get the distance moved or the distance moved to get weight if you are only given the work done.
Incidentally, the mechanical advantage in diagram is A is 1 whereas the mechanical advantage in B is 2.
So in B you would apply 1/2 the force as in A and would have to move the rope twice as far as in A to do the same amount of work.
An object that is 0.5 m above the ground has the same amount of potential energy as a spring that is stretched 0.5 m. Each distance is then doubled. How will the potential energies of the object and the spring compare after the distances are doubled? The gravitational potential energy of the object will be two times greater than the elastic potential energy of the spring. The elastic potential energy of the spring will be four times greater than the gravitational potential energy of the object. The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object. The potential energies will remain equal to one another.
Answers
Answer:
The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Explanation:
Let U₁ = mgx be the gravitational potential energy of the object and U₂ = 1/2kx² the elastic potential energy of the spring.
Since U₁ = U₂ = U at x = x₀ = 0.5 m.
if x = 2x₀,
The gravitational potential energy is U₃ = mg(2x₀)
= 2mgx₀
= 2U
The elastic potential energy of the spring is U₄ = 1/2k(2x₀)²
= 1/2k × 4x₀²
= 4(1/2kx₀²)
= 4U
Now, U₄/U₃ = 4U/2U = 2
U₄ = 2U₃
So, the elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Answer: The answer is C, The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Explanation:
In Problem 6, what is the acceleration of the electron? (Recall, F=ma. The mass of an electron is 9.11.103 kg. The answer will be a large number.)
Answers
Answer:
Explanation:
And the condition of problem N 6 ???
Equilibrium of forces
Answers
The equilibrium distance of A on the beam HP is 7 meters because of the increased weight which is a force at point H.
What is equilibrium force?An equilibrium is utter to be stable if small, externally induced displacements from that state manufacture forces that tend to oppose the movement and return the body or particle to the equilibrium state. There are three types of equilibrium: stable, unstable, and neutral.
systematic for Equilibrium with Three Forces only. select zero degrees to be the +x-axis, and 90° to be the +y-axis. When this force system is acting on a body, equilibrium is possible only if an opposite balancing force is applied by the body (or its supports).
So we can conclude that the Equilibrium of a body is a state in which all the forces acting on the body are steady, and the net force acting on the body is zero.
Learn more about Equilibrium here: https://brainly.com/question/517289
#SPJ1
n this activity, you will answer questions based on these two scenarios. Scenario 1 It’s the week before final exams, and Alicia is looking forward to graduation. However, she knows the week will be stressful. In addition to studying hard for her exams, her manager at work called and asked her to work an additional 15 hours. Her softball coach scheduled double practices to prepare for state finals. Her aunt has asked her to babysit her niece a few hours each night. On top of all this, she wants to spend some much-needed quality time with her friends. Alicia wishes there were 86 hours in a day instead of 24. Scenario 2 A small nation's economy depends on oil. The country’s earnings have declined greatly because of a recent drop in oil prices. The government uses these earnings to provide free education to all citizens under the age of 25. The country also uses its earnings to provide free health care and to provide benefits for retirees. The government also uses part of its earnings to help a neighboring country recover from a natural disaster. The president of the country imagines how much he could help his citizens if there weren’t any budget restrictions. Part A What do Alicia and the president have in common?
Answers
Answer: Alicia and the president do not have enough of a particular resource. Alicia doesn’t have enough time, and the president doesn’t have enough money.
Explanation: This is Plato's sample answer.
The force acting on a tugboat is described by the vector(6 newtons,–3 newtons). What is the direction of the force in degrees, to thenearest tenth of a degree?
Answers
In order to calculate the direction of the vector, first let's draw its components:
since the horizontal component is positive and the vertical component is negative, the vector is pointing to the 4th quadrant.
To calculate the angle, we can use the arc tangent as follows:
\(\begin{gathered} \tan (\theta)=\frac{-3}{6} \\ \tan (\theta)=-0.5 \\ \theta=\tan ^{-1}(-0.5) \\ \theta=-26.56\degree \end{gathered}\)Rounding to nearest tenth, the direction is -26.6°.
Who invented scuba?
1. Benjamin Franklin
2. Mathew Maury
3. Robert Falcon Scot
4. Cousteau and Gagnon
Answers
Answer:
2. Mathew Maury
Explanation:
2. Mathew Maury
4. Cousteau and Gagnon
Explanation:
they made the first successful scuba in 1942
Carbon dioxide undergoes a phase change called sublimation, how does a single molecule of carbon dioxide change as a result of this process in terms of its energy and physical characteristics? a. There is a physical change from a gas to a liquid; energy is released into the environment reducing the molecular movement. b. There is a physical change from the solid state to a gas state where energy between the molecules increases. c. There is a chemical change between the carbona nd oxygen resulting int he formation of oxygen gas which has more energy d. There is a chemical change as the carbon dioxide is transferred from a liquid to a solid reducing the amount of energy
Answers
The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.
What is the process of sublimation in carbon dioxide?During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.
As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.
Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.
Learn more about sublimation
brainly.com/question/15057312
#SPJ11