A 52-kg bike is moving along a smooth road at a constant velocity of 8.4 m/s. What is the net force acting on the bike
Answers
Answer:
0 N
Explanation:
Net force = mass × acceleration
∑F = ma
The velocity is constant, so the acceleration is 0. Therefore, the net force is 0.
The net force acting on the bike is 0 N.
What is net force?Net force is the sum of all forces acting on an object. The net force can be calculated using Newton's second law, which states that F = ma, where: F is the net force. m is the mass of the object. a is acceleration.
The velocity is constant, so the acceleration is 0. Therefore, the net force is 0 N.
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Related Questions
Please answer will mark brainlyist
Answers
Answer:
B) golf
Explanation:
i think
what evidence is there that fields exist between objects even if those objects are not in contact?
Answers
Gravitational force -an attractive force that exists between all objects with mass
What is a force of attraction between two objects even if they are not touching?Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching.An apple falling down from a tree is one of the best examples of non-contact force.Iron pins attracted in the presence of a magnet bar without any physical contact.Falling raindrops on earth is also an example of a non-contact force.Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe.
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Fields exist between objects even if objects don't have any contact because gravity pulls them toward each other.
What is gravity?gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. It is by far the weakest known force in nature and thus plays no role in determining the internal properties of everyday matter. On the other hand, through its long reach and universal action, it controls the trajectories of bodies in the solar system and elsewhere in the universe and the structures and evolution of stars, galaxies, and the whole cosmos. On Earth all bodies have a weight, or downward force of gravity.In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which causes mutual attraction between all things with mass or energy.To learn more about gravity refer to:
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HELP ME Please!!!!!!
Select ALL that apply
Answers
Answer:
Increase the number of coils.
Explanation:
By increasing the number of coils we can increase the electromagnet.
next an electric force acts on the proton and does 2.8 × 10-9 j of work on the particle. now what are the following values? particle energy = j rest energy = j kinetic energy = j
Answers
particle energy is 2.9515 x \(10^-9\) J, the rest energy is 1.505 x \(10^-10\) J, and the kinetic energy is 2.8 x \(10^-9\) J.
The total energy of a particle can be expressed as the sum of its rest energy and its kinetic energy:
E_total = E_rest + E_kinetic
The rest energy of a proton can be calculated using the famous equation proposed by Einstein:
E_rest = m*\(c^2\)
The mass of a proton is approximately 1.673 x 10^-27 kg, and the speed of light is approximately 2.998 x 10^8 m/s.
E_rest = (1.673 x \(10^-27 kg\))(\(2.998 x 10^8 m/s)^2\)
E_rest = 1.505 x \(10^-10\) J
Next, we need to determine the kinetic energy of the proton. The work done by the electric force on the proton is equal to the change in its kinetic energy:
W = E_final - E_initial = E_kinetic final - E_kinetic initial
the initial kinetic energy of the proton is zero (since it was at rest initially), and the electric force does 2.8 x \(10^-9\) J of work on the proton. the final kinetic energy of the proton can be calculated as:
E_kinetic final = W + E_kinetic initial
E_kinetic final = 2.8 x \(10^-9\) J + 0
E_kinetic final = 2.8 x \(10^-9\) J
Finally, we can calculate the total energy of the proton as:
E_total = E_rest + E_kinetic final
E_total = 1.505 x \(10^-10\) J + 2.8 x \(10^-9\) J
E_total = 2.9515 x \(10^-9\) J
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If you know the acceleration and time, how can you calculate the average velocity?.
Answers
The average velocity in terms of acceleration and time is 1/2at².
Average velocity:
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.
Assume the acceleration a is uniform then:
v(t) = u + at
u = initial velocity
By average velocity v we mean average over time than strictly speaking:
v = 1/t \(\int\limits^t_0 {v(t)} \, dt\)
= 1/t \(\int\limits^t_0 {(u + at)} \, dt\)
= 1/t ( ut + 1/2 at²)
v = u + 1/2at²
If u =0, then we have
v = 1/2 at²
Therefore the average velocity is 1/2at².
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A cosmic catastrophe jolts earth so that its axis is perpendicular to the orbital plane between earth and the sun. The largest effect of this change would be?.
Answers
A cosmic catastrophe jolts earth so that its axis is perpendicular to the orbital plane between earth and the sun therefore the largest effect of this change would be the elimination of seasonal variation.
What is Season?This is referred to as the period of the year that is distinguished by special climate conditions and examples include winter, summer etc.
In a situation where a cosmic catastrophe results in it being perpendicular to the orbital plane between earth and the sun there will be no seasonal variation as a result of it hindering the effect of the sun and other factors.
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A light bulb is filled with a gas at a
température of 293 K. If the initial pressure
of the gas is P. what will the pressure be
when the temperature increases to 360 K?
Answers
after a rainy day, jeff noticed a rainbow in the sky. which wave interaction explains the formation of the rainbow?A. Reflection,refraction and dispersionB. Refraction,dispersion and total reflectionC. Refraction,dispersion and internal reflectionD. Dispersion,scatering and total internal reflection
Answers
The correct option is C, After a rainy day, jeff noticed a rainbow in the sky. which wave interaction the formation of rainbow involves all three phenomenon: Refraction, dispersion, and total internal reflection.
Total internal reflection is a phenomenon that occurs when light traveling through a denser medium, such as glass or water, strikes the boundary with a less dense medium, such as air. In this situation, instead of refracting or bending towards the less dense medium, the light reflects back into the denser medium.
This phenomenon is due to the fact that the angle of incidence of the light wave exceeds the critical angle, at which the angle of refraction would be 90 degrees. As a result, the light is completely reflected back into the denser medium, without any transmission to the less dense medium. This effect is known as total internal reflection.
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From 10 to 20 seconds, the object is traveling at a constant 5 meters per second. How far did it travel in that 10 second time frame?
Answers
Answer:50m
Explanation:
Which of the following determines the identity of an atom?
A. atomic mass
B. mass number
C. atomic number
D. charge
Answers
Using the Skygazer's Almanac for 2022 at 40 degrees.
What day will Venus and Saturn be in opposite parts of the sky
this year?
Answers
According to the Skygazer's Almanac for 2022 at 40 degrees, Venus and Saturn will be in opposite parts of the sky on December 17, 2022.
The Skygazer's Almanac provides astronomical information for a specific location and year. In this case, at a latitude of 40 degrees, the almanac indicates that Venus and Saturn will be in opposite parts of the sky on December 17, 2022. This means that Venus and Saturn will appear at opposite sides of the celestial sphere as observed from Earth. However, it's important to note that the almanac's predictions are approximate and can be influenced by various factors, including atmospheric conditions and the observer's specific location. To obtain the most accurate and up-to-date information, it is recommended to consult more recent astronomical sources or use specialized software that can provide precise positions and dates for celestial events.
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what is frictional less pulley
Answers
Answer:
Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.
Explanation:
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Which one is the right answer?
Newton’s second law of motion relates an objects acceleration to _____.
A. It’s mass
B. It’s velocity
C. The net force acting on it.
D. Two of the above
Answers
Answer:
C. The net force acting on it.
Suppose a planet has an atmosphere of pure ammonia at 4.3 ∘C.
What is the rms speed of the ammonia molecules? (The molecular weight of ammonia, NH3, is 17.03 g/mol.)
Answers
The rms speed of ammonia molecules in the given atmosphere is approximately 517 m/s.
The rms speed (v) of gas molecules can be calculated using the following equation:
v = sqrt(3RT/M)
The root-mean-square (rms) speed of ammonia molecules in an atmosphere at 4.3 °C can be calculated using the formula vrms = sqrt((3kT)/m), where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of a single ammonia molecule.
where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.
Converting the given temperature of 4.3 ∘C to Kelvin, we get:
T = 4.3 + 273.15 = 277.45 K
The molar mass of ammonia (NH3) is 17.03 g/mol.
The gas constant (R) is 8.314 J/(mol*K).
Substituting these values in the equation for rms speed, we get:
v = sqrt(3 * 8.314 * 277.45 / 0.01703)
v ≈ 517 m/s
Therefore, the rms speed is found to be approximately 517 m/s.
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How does ballistic stretching improve flexibility?
Answers
Ballistic stretching works muscles through a variety of motions to increase flexibility. Ballistic stretching before exercise prepares the muscles for high-impact action. Consequently.
A ballistic stretching is what?Ballistic Method It is the oldest technique for stretching exercises. This strategy employs quick movements. A joint or even a muscle can be stretched with only repetitive motions or activities around it. It is essential to warm up properly before beginning such a workout.
Ballistic stretching uses the velocity of a moving person or limb to push an object outside its inherent range of motion. You are "starting to warm up" or stretched by jumping into an extended posture and using your stretched muscles like a springtime to pull yourself out of it.
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In a domestic electric circuit (220.V),an electric kettle of 3kW power rating is operatedthat has a current rating of 4A. What result do you expect? Explain.ii)In our homes there are two separate circuits one for high power rating appliances and other for low power rating appliances.Why?Givereasons.
Answers
Answer:
(i) It will take longer (75/22 times) the time to boil a given quantity of water compared to when the current is working at its rated capacity
(ii) The reasons are;
(1) For economy; most of the appliances in the home only require low power circuitry with thinner wire while a separate high power circuitry is created directly from the main supply for the high electric power rated appliances
(2) For safety; to prevent the over heating of the electric circuits when an high electric power appliance needs to be connected an high power electric power outlet has to be specified
Explanation:
(i) The power rating of the kettle = 3 kW
The voltage rating of the circuit, V = 220 V
The current rating, I = 4 A
The formula for electric power = I² × R = I × V
Therefore, we have;
Power produced = 220 V × 4 A = 880 V·A = 800 W
Hence, since the power produced is below the power rating of the electric kettle, it will take a longer time to boil a given amount of water than specified by the kettle manufacturer
The energy supplied H = V×I×t
Where:
t = Time in seconds
Therefore, we have;
3 kW = 3000 W;
3000 × t₁ = 880 × t₂
t₂/t₁ =3000/880 = 75/22
Hence the kettle will take 75/22 multiplied by the time it takes when working at rating capacity to boil a given quantity of water
(ii) This is so because the power consumption already factored in the electrical installation as well as the type of appliances utilized in the home allow for several low power rating consumption and few high power rating consumption
Therefore, for both economy and safety the electrical circuit are split to allow for the use of very thick copper or aluminium electric cables in the high power rating electric circuits to which can be plugged high electric power consuming devices such as the water heater and electric cooker
The low electric power consuming devices, such as the electric bulb and fans are connected to the low or "regular" power rating electric circuit outlets
The current required for high power and low power appliances is different and also the fuse rating required for both the appliances different, so two separate circuits are used for high power and low power appliances.
a student is studying motion and creates two velocity vectors, A and B. They are shown in the image below.
B
Compare the motion described by the two vectors, A and B. Explain why this would not be appropriate for describing speed.
Answers
To fully understand and compare the motion described by vectors A and B, it is important to consider both their magnitudes (speeds) and directions.
We can provide you with some general information regarding velocity vectors A and B and why they may not be appropriate for describing speed alone.
Velocity is a vector quantity that includes both magnitude (speed) and direction. In order to accurately describe motion, it is essential to consider both aspects. If a student creates two velocity vectors, A and B, it implies that they are representing both magnitude and direction.
If we focus solely on speed, which is the scalar quantity representing the magnitude of velocity, then comparing velocity vectors A and B may not be appropriate. Speed is the absolute value of velocity and does not take direction into account. It would not provide information about the direction of motion, which is crucial for a complete understanding of an object's movement.
For example, if vector A has a speed of 10 m/s and vector B has a speed of 10 m/s as well, we cannot conclude that the motion described by both vectors is the same. They could have entirely different directions, leading to distinct paths or trajectories. Vector A could be representing motion to the east, while vector B could represent motion to the west.
Therefore, to fully understand and compare the motion described by vectors A and B, it is important to consider both their magnitudes (speeds) and directions.
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What substitution do we make to start working on a Bernoulli equation?
Answers
The question pertains to the Bernoulli equation and asks about the initial substitution that needs to be made when working with this equation.
To begin working with the Bernoulli equation, the initial substitution involves replacing the total pressure (which includes both static pressure and dynamic pressure) with the sum of the static pressure and the pressure due to the velocity of the fluid. This substitution simplifies the equation by separating the pressure terms from the velocity terms. The Bernoulli equation relates the pressure, velocity, and elevation of a fluid along a streamline and is derived from the principles of conservation of energy for an ideal, incompressible fluid flow.
The Bernoulli equation states that the sum of the pressure energy, kinetic energy, and potential energy per unit volume of fluid is constant along a streamline. By substituting the total pressure with the sum of static pressure and the pressure due to velocity, the equation becomes more amenable to analysis and can provide insights into the behavior of the fluid flow. This initial substitution is crucial for applying the Bernoulli equation and analyzing various fluid flow scenarios, such as in pipes, nozzles, and airfoils.
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New ecosystems have been created by human land use.
Answers
At present, many artificial ecosystems have been built according to human purpose and demand, such as farmland, artificial grassland, greenhouse, economic forest, aquaculture farm and many more. These ecosystems have a fundamental change in structure and function compared with the original ecosystem.
Answer:
Yes
Explanation:
When humans use land, they change it to accommodate their own needs, and thus new locations and new habitats for other organisms are created. These organisms can now live there and create new organisms, and thus create new ecosystems as a result of human use of that particular piece of land.
PLEASE HELP ME,, I WOULD BE SO HAPPY
You push against a wall with all your might and generate an insane 2500N of force. However, the wall doesn't move. How much work did you do?PLEASE HELP ME,, I WOULD BE SO HAPPY You push against a wall with all your might and generate an insane 2500N of force. However, the wall doesn't move. How much work did you do?
Answers
Answer: None
Explanation:
Since the wall did not move, it does not matter how much force you generated. You did no work in the physics sense.
Work is calculated by multiplying the displacement by the force. Since there was no displacement (no movement) we put the value as 0. 0 times anything is still 0, as shown below.
2500 N * 0 = 0.
You did no work, or 0 J of work.
There is a long seesaw in the schoolyard James school. James likes to play on the seesaw with his friend Martin. The seats are in the schoolyard is long enough that I went James site is in the air, his feet RSI up as other children said. What forces James when he uses the seesaw 
Answers
The force that affects James when he uses the seesaw is force of gravity. Option C.
What is force of gravity about?Gravity may be a constrain that exists between any two objects within the universe that have mass. It is an appealing constrain, meaning it pulls objects towards each other. The size of the gravitational constrain depends on the mass of the objects and the separate between them. The bigger the masses of the objects and the closer they are to each other, the more grounded the gravitational drive between them.
Hence, gravity is the force that pulls James down towards the center of the Soil. This drive is dependable for keeping James situated on the teeter-totter and making him move up and down as he plays. The other alternatives, power, contact, and attractive drive, are not pertinent in this situation and don't play a part within the functioning of the teeter-totter.
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What is the kinetic energy of a 14kg object traveling at 10m/s
Answers
Answer:
Explanation:
kinetic energy=1/2*mass*velocity^2
=1/2*14kg*10^2
=7*100
=700 joule
In which part of the EM spectrum do you see the colors red, orange, yellow, green, blue, indigo, and violet (ROYGBIV);
gamma rays
ultraviolet rays
microwaves
visible light
Answers
Answer:
gamma rays
Explanation:
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What is the frequency of a wave that passes a given point 412 times in 4.0
seconds?
O A. 0.0097 s
OB. 103 Hz
O C. 408 S
O D. 1650 Hz
SUBMIT
Answers
Answer: A.0,0097s
Mas a unidade aí deveria ser Hertz (Hz)
Explanation:
Answer:
103 hz
Explanation:
28.5 g of calcium carbonate (CaCOn reacts with an excess of sulfuric acid
(H SOg) to farm calcium sulfate (CasOn), carbon dioxide (COal and water (H.O). Calculate the mass of calcium sulfate that will be formed in this reaction
Answers
36.98 g of calcium sulfate will be formed in this reaction.
How to determine mass?The balanced chemical equation for the reaction is:
CaCO₃ + H₂SO₄ → CaSO₄ + H₂O + CO₂
According to the equation, 1 mole of CaCO₃ reacts with 1 mole of H₂SO₄ to produce 1 mole of CaSO₄. The molar mass of CaCO₃ is 100.09 g/mol, which means that 28.5 g of CaCO₃ is equal to:
28.5 g / 100.09 g/mol = 0.2848 mol CaCO₃
Therefore, the amount of CaSO₄ produced is also 0.2848 mol. The molar mass of CaSO₄ is 136.14 g/mol, so the mass of CaSO₄ produced is:
0.2848 mol x 136.14 g/mol = 36.98 g
Therefore, 36.98 g of calcium sulfate will be formed in this reaction.
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if a truck travels 5 kilometres in 10 minutes find the average velocity of the truck?
Answers
Answer:
8.33
Explanation:
av= distance travelled /time taken
A certain lever system is only 30% efficient. The following changes are considered:
change 1: Use a stiffer lever to reduce energy lost bending the lever.
change 2: Make a longer lever that will require less force.
Which change would make the lever more efficient?
Change 1 would make the lever more efficient because less energy would be lost.
Change 2 would make the lever more efficient because this would make it easier to lift.
Change 1 would make the lever more efficient because this would make it easier to lift.
Change 2 would make the lever more efficient because less energy would be lost.
Answers
Answer: Change 2 would make the lever more efficient because this would make it easier to lift.
Explanation:
The considered change is: Make a longer lever that will require less force because it would make the lever more efficient because this would make it easier to lift.
What is lever?A beam is pivoted at a fixed fulcrum, to form a simple machine known as a lever. A body that can rotate about a point on itself is called a lever.
The lever is classified into three types based on where the fulcrum, weight, and effort are located. Additionally, leverage is a systemic mechanical advantage.
One of the six simple devices that Renaissance scientists identified. Leverage is the ability to increase an input force into a bigger output force through the use of a lever. The mechanical advantage of the lever is determined by the ratio of output force to input force.
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Study the scenario. A book falls off a table and lands on the floor. The isolated system consists of the book and the floor, and ignores air resistance. The amount of energy in the system is 5 J when the book is sitting on the table. At some point during its fall, there is 4 J of gravitational potential energy in the system. Which choice best describes the amount and form of energy in this system when the book is at this point?
Answers
When the book is at the point where there is 4 J of gravitational potential energy in the system, the total amount of energy in the system will still be 5 J, since energy cannot be created or destroyed, only transformed from one form to another.
At this point, the energy in the system will consist of two forms: gravitational potential energy and kinetic energy. The 4 J of gravitational potential energy is due to the book's position relative to the floor, and is equal to the work done by gravity in lifting the book from the floor to its initial position on the table. As the book falls, this potential energy is converted into kinetic energy, which is the energy of motion. The kinetic energy of the book increases as it falls, until it reaches the floor, at which point all of the potential energy has been converted into kinetic energy.
Therefore, at the point where there is 4 J of gravitational potential energy in the system, the remaining 1 J of energy in the system will be in the form of kinetic energy.
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The complete question is:
Study the scenario. A book falls off a table and lands on the floor. The isolated system consists of the book and the floor, and ignores air resistance. The amount of energy in the system is 5 J when the book is sitting on the table. At some point during its fall, there is 4 J of gravitational potential energy in the system. Which choice best describes the amount and form of energy in this system when the book is at this point?
a) 5J
b) 4J
c) 9J
d) cant say
The strength of the
of gravity
between two
Answers
An electromagnetic wave Group of answer choices a.Never moves b.Can travel through empty space or matter. c. Can travel only through empty space. d. Cannot travel through matter
Answers
Answer:
b
Explanation:
because electromagnetic waves can travel in vacuum as they don't require particles to transfer energy from one point to another. they can also travel through mediums such as the wall or air, if not how do radio waves transfer energy in this hyper advanced world? through the air
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