dirk pushes on a packing box with a horizontal force of 75.0 n as he slides it along the floor. the average friction force acting on the box is 5.0 n. how much total work is done on the box in moving it 2.50 m along the floor?
Answers
Total work done to be done on the box in moving it 2.50 m along the floor is 175 j.
Friction force is an opposing force of motion. It comes into play when an object moves over the surface of another object.
We can find the friction force using formula,
\(F_{friction\) = µ • \(F_{normal\)
Where,
\(F_{friction\) = friction force
µ = coefficient of friction
\(F_{norm\) = normal force.
In question given is
Horizontal force(F) = 75 N
Average friction force (f) = 5.0 N
displacement = 2.50 m
\(F_{net\) = F-f
= 75- 5 N = 70 N
Work done by the force is
W = \(F_{net\) × S
= 70 × 2.50 j
= 175 j
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Related Questions
A bowling ball is dropped from the top of a building that has a height of h = 159 m.a) Assuming air resistance is negligible, what is the ball's speed, vf in m/s, when it strikes the ground? b) If drag produces an opposing force of 10 N while the ball's falling, what is the ball's speed, vf in m/s, when it strikes the ground? Assume the ball has a mass of 5 kg.c) A different ball was dropped and the final speed was measured to be vf = 6.5 m/s while the drag force was measured to be 50 Newtons. What is the mass of this ball in kg?
Answers
ANSWER:
a) 55.82 m/s
b) 49.8 m/s
c) 5.17 kg
STEP-BY-STEP EXPLANATION:
Given:
Height (h) = 159 m
Initial speed (vi) = 0 m/s
a)
We calculate the final speed using the following formula:
\(\begin{gathered} (v_f)^2=(v_i)^2+2gh \\ \\ \text{ we replacing:} \\ \\ (v_f)^2=(0)^2+2(9.8)(159) \\ \\ v_f=\sqrt{3116.4} \\ \\ v_f=55.82\text{ m/s} \end{gathered}\)\(\begin{gathered} (v_f)^2=(v_i)^2+2gh \\ \\ \text{ we replacing:} \\ \\ (v_f)^2=(0)^2+2(9.8)(159) \\ \\ v_f=\sqrt{3116.4} \\ \\ v_f=55.82\text{ m/s} \end{gathered}\)b)
To determine the final velocity with the opposing force, we have to determine the net force and then calculate the acceleration that would be used to calculate the velocity, like this:
\(\begin{gathered} F_n=mg-10 \\ \\ \text{ we replacing} \\ \\ F_n=5\cdot9.8-10 \\ \\ F_n=49-10=39\text{ N} \\ \\ F=m\cdot a \\ \\ a=\frac{F}{m}=\frac{39}{5} \\ \\ a=7.8\text{ m/s^^b2} \\ \\ \text{ Therefore:} \\ \\ (v_f)^2=(v_i)^2+2ah \\ \\ \text{ we replacing:} \\ \\ (v_f)^2=(0)^2+2(7.8)(159) \\ \\ v_f=\sqrt{2480.4} \\ \\ v_f=49.8\text{ m/s} \end{gathered}\)c)
We can calculate the mass in the following way, first, we must calculate the acceleration to be able to determine the mass:
\(\begin{gathered} (v_{f})^{2}=(v_{i})^{2}+2ah \\ \\ \text{ we replacing:} \\ \\ 6.5^2=0^2+2\cdot a\cdot(159) \\ \\ 318a=42.25 \\ \\ a=\frac{42.25}{318} \\ \\ a=0.133\text{ m/s^^b2} \\ \\ \text{ Now we can calculate the mass using the force balance:} \\ \\ ma=mg-50 \\ \\ a=g-\frac{50}{m} \\ \\ \text{ we replacing:} \\ \\ 0.133=9.8-\frac{50}{m} \\ \\ 1.333-9.8=-\frac{50}{m} \\ \\ -9.667m=-50 \\ \\ m=\frac{-50}{-9.667} \\ \\ m=5.17\text{ kg} \end{gathered}\)How much work would have to be done by a force in moving an electron through a positive potentialdifference of 2.0 x 10^6V?
Answers
The work done by a force in moving an electron through a positive potential difference of 2.0 x 10^6V can be calculated using the formula W = q x V, where W is the work done, q is the charge of the electron (which is 1.6 x 10^-19 C), and V is the potential difference. Plugging in the values, we get:W = (1.6 x 10^-19 C) x (2.0 x 10^6V)
W = 3.2 x 10^-13 J
Therefore, the amount of work that would have to be done by a force in moving an electron through a positive potential difference of 2.0 x 10^6V is 3.2 x 10^-13 J.
To calculate the work done in moving an electron through a positive potential difference, you can use the following equation:Work (W) = Charge (q) × Potential Difference (V)
The charge of an electron (q) is approximately -1.6 × 10^-19 Coulombs, and the potential difference (V) given in the problem is 2.0 × 10^6 V.
W = (-1.6 × 10^-19 C) × (2.0 × 10^6 V)
W = -3.2 × 10^-13 Joules
The negative sign indicates that the work done is against the direction of the electric field. Therefore, the work required to move an electron through a positive potential difference of 2.0 × 10^6 V is 3.2 × 10^-13 Joules.
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How much space there is between rock and soil to hold water ?
Answers
Answer:
Explanation:
The amount of space between rock and soil that can hold water is known as porosity. Porosity is a measure of the void spaces in a material, typically expressed as a percentage of the total volume of the material. In other words, it's the ratio of the volume of pore space in a rock or soil to the total volume of the rock or soil.
The porosity of rock and soil can vary widely, depending on the type of rock or soil and the conditions under which it formed. For example, some types of rock, such as sandstone, have high porosity (around 30-40%) because they are composed mostly of grains of sand that are held together by a small amount of cement. Other types of rock, such as granite, have very low porosity (around 1-2%) because they are composed mostly of tightly packed mineral crystals.
Soil, on the other hand, can have a wide range of porosity depending on the soil type. Sandy soils tend to have higher porosity than clay soils, but even within a soil type, porosity can vary greatly depending on the soil structure, organic matter content, and other factors.
In general, the porosity of rock and soil can range from less than 1% to over 40%. In order to hold water, the porosity should be greater than zero.
If a net force of 24 N is applied to an object with a mass of 6 kg, then what will the resulting
acceleration be according to Newton's second law of motion?
a
b
C
d
6 m/s²
0.25 m/s²
24 m/s²
4 m/s²
Answers
Answer:
d. 4 m/s²
Explanation:
pls mrk me brainliest
Did Einstein say compound interest is the 8th wonder of the world?
Answers
Yes, it is commonly attributed to Albert Einstein that he said, "Compound interest is the eighth wonder of the world. He who understands it, earns it... he who doesn't... pays it."
However, there is no direct evidence that he actually said this, and some sources suggest that the quote may have been misattributed to him. Nonetheless, the quote has become popular in the world of finance and investing as a way to emphasize the power of compound interest in generating wealth over time.
Compound interest refers to the process of earning interest on both the initial amount of an investment and on the accumulated interest. This means that as time goes on, the amount of interest earned can grow exponentially, leading to significant gains in the value of an investment over the long term. This is why compound interest is often referred to as the "eighth wonder of the world" as it can have a dramatic impact on financial outcomes.
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How Negative Points Works
btw help me with this
How much does the sky weigh?
Answers
Answer:
it weighs 237469812734t7162341873498273417234321476281736481273648123764812736481723648273648137468127364872364 million pounds :)
Explanation:
Answer:
This is a dumb question.
Explanation:
The 'sky' does not weigh anything.
Decide which physical states are indicated in the following statement. Choose all that apply. Particles are in motion. a) solid. b) liquid. c) gas. d) none of these.
Answers
The given statement “Particles are in motion” is indicating that particles have kinetic energy and are moving. Hence, this statement is not indicating a specific state of matter. Hence, None of these. is the right option.
However, based on the states of matter, we can say that the motion of the particles depends on the physical state of matter. The three states of matter are:
Solid: In this state of matter, the particles have the least amount of kinetic energy and are held tightly in their positions by intermolecular forces. As a result, they are only capable of vibrating around their mean positions. The vibrations increase with an increase in temperature.
Liquid: In this state of matter, the particles have more kinetic energy than solids and are held together by relatively weaker intermolecular forces. The particles in the liquid are constantly in motion, which allows them to slide past one another and take the shape of the container that they are in. As temperature rises, the kinetic energy also increases.
Gas: In this state of matter, the particles have the highest amount of kinetic energy and are held together by the weakest intermolecular forces. The particles are in constant, random motion and are free to move in any direction. This gives them the ability to take up all the available space in a container.
The question should be:
Decide which physical states are indicated in the following statement. "Particles are in motion" Choose all that apply. Particles are in motion. a) solid. b) liquid. c) gas. d) none of these.
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Typical Pressurized Water Reactors can produce 1100 to 1500
megawatts, or about _______
Joules/second.
Answers
Answer: about 1,100,000,000 to 1,500,000,000 Joules/second
Explanation:
1 MW (megawatt) = 1,000,000.00 J/s (joules per second)
1100(1,000,000) = 1,100,000,000
1500(1,000,000) = 1,500,000,000
You paddle a canoe with a force of 325 N. You and the canoe have a
combined mass of 250 kg. What is the acceleration of the canoe?
A. 0.8 m/s2
B. 0.3 m/s2
C. 1.9 m/s2
D. 1.3 m/s2
Answers
any person who opens the door he applies
Answers
Answer:
any person who opens the door he applies pulling force
a strong magnetic field prevented the creation of what
Answers
A strong magnetic field prevented the creation of charged particles or ions.
This is because the magnetic field exerts a force on charged particles, causing them to move in a circular path around the field lines, which in turn prevents them from combining and forming new particles or ions.
A strong magnetic field can have various effects on the physical and chemical processes occurring within a system, and can sometimes prevent the creation or modification of certain materials or structures.
One example of this is in the field of material science and engineering, where magnetic fields can be used to control the growth and alignment of crystalline structures in materials.
In some cases, a strong magnetic field can prevent the creation of certain materials altogether.
For example, when attempting to produce graphene using chemical vapor deposition (CVD), a strong magnetic field can disrupt the growth process and prevent the formation of the desired structure.
This is because the magnetic field can affect the movement and orientation of the precursor molecules, leading to a non-uniform growth pattern and the formation of defects in the graphene lattice.
Similarly, in certain chemical reactions, a strong magnetic field can alter the rate and outcome of the reaction, making it difficult or impossible to create certain products.
This is because the magnetic field can affect the spin states of the reacting molecules and alter their reactivity and selectivity.
Overall, a strong magnetic field can have significant and sometimes unpredictable effects on the creation and modification of materials and chemicals, and must be carefully considered and controlled in many research and industrial processes.
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An alternating current runs through a circuit. after a long time, how much charge has passed through the circuit?
Answers
Option C) Infinite charge has passed through the Circuit
How does alternating current work?Alternating current, also known as AC, is an intermittent electric charge flow.
It might begin at zero, increase to a maximum, decline to zero, turnabout, reach a maximum in the opposite direction, return to the starting value once more, and repeat this cycle indefinitely.
What three alternating current examples can you give?Both the current we receive from our home power outlets and the current generated by generators or turbines are AC currents. Most electrical appliances, including fans, bulbs, air conditioners, and motors, operate on AC current.
What does the name “alternating current” mean?In contrast to direct current (DC), which only travels in one direction and cannot sporadically shift, alternating current (AC) is an electric current that periodically reverses direction.
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Acceleration is a change in what quantity Over time?A- speed B- distance C- force D- displacement
Answers
To find
Acceleration is a change in what quantity Over time?
Explanation
Acceleration is defined as the change in velocity with respect to time interval.
Conclusion
The required quantity is
A. speed
What is the momentum (in kg*m/s) of a stationary car weighing 9810N?
Answers
The momentum of the stationary car weighing 9810N is zero.
The momentum (p) of an object is defined as the product of its mass (m) and its velocity (v):
p = m * v
Since the car is stationary, its velocity is zero. However, we can still calculate its momentum using its weight (W) and the acceleration due to gravity (g), which is approximately 9.81 \(m/s^2\):
W = m * g
Rearranging this equation, we can solve for the mass of the car:
m = W / g
Substituting the given weight of the car, we get:
m = 9810 N / 9.81 \(m/s^2\) = 1000 kg
Now we can calculate the momentum of the car as:
p = m * v = 1000 kg * 0 m/s = 0 kg*m/s
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hydrogen bombs and stars both produce energy with nuclear ?
Answers
Answer:
If we are talking fusion. Yes they both use nuclear fusion.
if its fission or anything else no.
Use standard notation to represent the following elements. 1. potassium 2. copper 3. chlorine
Answers
Copper: Cu
Chlorine: Cl
i hope this is what you’re asking for
Answer:
K
Cu
Cl
Explanation:
A 535 kg roller coaster car began at rest at the top of a 93.0 m hill. now it is at the top of the first loop-de-loop. an illustration of a roller coaster track with the first hill labeled 93.0 m high and it goes down to a vertical loop with the car at the top. the loop is labeled as 62.0 m high. this roller coaster’s track is nearly frictionless, so resistance can be ignored. using g = 9.8 m/s2, what best describes the roller coaster car when it is at the top of the loop-de-loop? the car has only potential energy, so it is moving at 0 m/s. the car has both potential and kinetic energy, and it is moving at 24.6 m/s. the car has both potential and kinetic energy, and it is moving at 34.9 m/s. the car’s potential energy has all been converted to kinetic energy, so it moves at 42.7 m/s.
Answers
Using g = 9.8 m/s2, the statement that best describes the roller coaster car when it is at the top of the loop-de-loop is that The car has both potential and kinetic energy, and it is moving at 24.6 m/s. The correct answer is B) The car has both potential and kinetic energy, and it is moving at 24.6 m/s.
Potential energy is the energy that is stored in any object or system as a result of its position or component arrangement. The environment outside of the object or system, such as air or height, has no impact on it. In contrast, kinetic energy refers to the energy of moving particles inside a system or an item.
The energy an individual or an object has as a result of motion in this case, the motion of the falling apple is known as kinetic energy. Potential energy, which exists in a bike that is parked on top of a hill, is converted to kinetic energy when you start riding it downhill. These two energies are both expressed as joules.
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Answer: B (The car has both potential and kinetic energy, and it is moving at 24.6 m/s.)
Explanation:
Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. What is her acceleration?
Answers
Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)
initial speed = 6.7 m/s
final speed = 2.3 m/s
time = 2.2 seconds
acceleration = change in speed / time interval
= 2.3 - 6.7 / 2.2
= -2 \(m/s^{2}\)
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Suppose that the modulated signal is op(t) = m, (t) cos at + m₂ (t) sin wet, where m, (t) and m₂ (t) are two different message signals. a) What is the name of this modulation type? (Sp) b) Draw the block diagram of the demodulation. (Sp) c) Mathematically show how to obtain m, (t) from the modulated signal. (10p)
Answers
a) The name of the given modulation type is Vestigial Sideband Modulation (VSB), c) The mathematical expression for obtaining m1(t) from the given modulated signal is as follows: Given modulated signal is, op(t) = m1(t) cos(at) + m2(t) sin(wt)
In order to obtain the message signal m1(t), the given modulated signal is multiplied by a carrier signal of frequency ‘a’ (same as the modulating signal) and then passed through a low-pass filter. The mathematical expression for the output signal of the low-pass filter can be derived as shown below:
Output of the multiplier = op(t) cos(at)
The Fourier series expansion of the above product is, where S(f) represents the spectrum of the message signal and its harmonics.
Output of the low-pass filter = FLP {op(t) cos(at)}
The frequency response of the low-pass filter can be shown as:
Now, by substituting the value of x in the above expression, we can get m1(t).
Thus, the message signal m1(t) can be obtained from the given modulated signal by multiplying it by a carrier signal of frequency ‘a’ (same as the modulating signal) and then passing it through a low-pass filter.
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In a simple machine the energy input is 120J if the efficiency of the machine is 80% calculate the energy output
Answers
Answer:
24J
Explanation:
The energy output will be the 20% it lost in efficiency:
120-80% = 24J
Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.110 kg, initially moves to the right at a speed of 4.60 m/s, while the second block, of mass 0.220 kg, is initially to the left of the first block and moving to the right at 6.90 m/s. Find the final velocities of the blocks, assuming the collision is elastic.
Answers
Answer:
The final velocities of the blocks are 3.00 m/s and 8.50 m/s, respectively.
Describe the processes necessary for social learning to occur.
Please HELP!!!!!!!
Answers
Answer:
Social learning occurs when four processes are present: 1) Attention: The learning organism must be paying attention to the modeled behavior. If there is no attention, the behavior cannot be processed into memory. 2) Retention: The learning organism must remember the behavior that was modeled.
Explanation:
Hope this helps.
Answer:
Social learning occurs when four processes are present:
1) Attention: The learning organism must be paying attention to the modeled behavior. If there is no attention, the behavior cannot be processed into memory.
2) Retention: The learning organism must remember the behavior that was modeled. If the behavior is not retained, it cannot be replicated.
3) Reproduction: The learning organism must be capable of producing the behavior. If the behavior is too skilled or impossible for the organism to replicate, then the reproduction will be unskilled or halting.
4) Motivation: The learning organism must be motivated to perform the behavior, or motivated not to perform the behavior. If the organism is not motivated to perform the behavior, and even if the organism is able to perform the behavior and knows how, it may not.
In EACH of the following pairs, circle the form of radiation with the
LOWER ENERGY (energy is directly related to frequency):
a. red light or blue light
b. microwaves or radio waves
c. infrared radiation or red light
d. gamma rays or UV radiation
e. yellow light or green light
f. x-rays or gamma rays
g. UV radiation or violet light
h. AM radio waves or FM radio waves
Answers
From of the following pairs, the form of radiation with the lower energy are
a.)microwaves or radio waves.
h.)AM radio waves or FM radio waves.
electromagnetic spectrum :
The electromagnetic spectrum is a collection of wavelengths, photon energies, and frequencies that extends frequencies.
wavelength increasing order of EM waves.gamma rays > X-rays > ultraviolet radiation > visible light > infrared radiation > radio waves.
wavelength ∝ 1 / frequency
energy is directly related to frequency is given as:E = hf
where
E = energy
f = frequency
h = Planck’s constant
From of the following pairs, the form of radiation with lower energy are
a.)microwaves or radio waves.
h.)AM radio waves or FM radio waves.
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Why is your physical and mental health important?
Answers
Answer: Mental health and physical health are very closely connected. Mental health plays a major role in your ability to maintain good physical health. Mental illnesses, such as depression and anxiety, affect your ability to participate in healthy behaviors.
Explanation: Hope this helped. Have a great day!!!!
Answer:
Both maths are very important to our daily lives. Physical math helps us understand the reality of life. Learning to do certain math strategies is the first stage to finding answers to problems. Mental math can help us get answers faster through memory. This can help improve strategic methods and strengthen our minds.
Determine the internal resistance of the capacitor.
Answers
Answer:
The equivalent series resistance of a capacitor is the internal resistance that appears in series with the capacitance of the device. Almost all capacitors exhibit this property at varying degrees depending on the construction, dielectric materials, quality, and reliability of the capacitor.
Explanation:
Hope this helps
Part of the electromagnetic spectrum is visible light. Which color is at the opposite end from red on the visible spectrum?.
Answers
Answer:
violet
Explanation:fart
instantaneous velocity can be positive, negative, or zero. True or False
Answers
Answer:
Explanation:
YES
((help please))
why might a CD be a more reliable way to copy and distribute a sound recording than a vinyl record
Answers
Answer:
Is either b or d
Explanation:
A CD be a more reliable way to copy and distribute a sound recording than a vinyl record because a CD is easier to copy exactly over and over again.
What are CDs and vinyl records?CDs are digital music storage devices, which means the music is binary data encoded. It uses a 2-channel, 16-bit, 44.1 kHz configuration as the norm for CDs. A laser reads the data, and after it has been decoded, audio is played back.
A sensitive needle known as a stylus is used to read the physical record of the music that is imprinted on the vinyl disc because vinyl is an analogue storage medium. The 12-inch 33-rpm LP, 7-inch 33-rpm EP, and 7-inch 45-rpm single make up the typical vinyl album.
The diameter and playback speed are what determine a vinyl disc's storage capacity (larger discs and slower playback means more capacity). The stereo channels are divided among the groove's two sides.
Hence, option (D) is correct.
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a lot of points, pls help. i need it done asap
How has our understanding of wave mechanics led to the implementation of tsunami warning systems in vulnerable regions? In your answer be sure to describe how scientists determine wave speed, direction, time of impact and potential wave height.
Answers
Answer:
I think it's how far out the water goes from the beach before the tsunami because before tsunami usually the water goes back way behind the tide before tsunami and that tells them everything they need I think
the vertical lines indicated in this model of a fold and threat belt likely represent ______.
Answers
The vertical lines in a fold and thrust belt likely represent faults.
What are faults ?The vertical lines in a fold and thrust belt likely represent faults. Faults are breaks in the Earth's crust along which there has been displacement of the rock on either side of the break. The vertical lines in a fold and thrust belt are typically caused by compressional forces that squeeze the crust together.
This compressional force causes the rock to bend and fold, and eventually, the rock breaks along a fault plane. The vertical lines in a fold and thrust belt are typically parallel to the direction of the compressional force.
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