Answer:
the change in momentum is 2.52 N·s
the constant force on the ball while in contact with the players foot is 126 N
Explanation:
p=momentum
m=mass
v=change in velocity
p=(0.42)(6)
p=2.52
The change in the ball's momentum is 2.52 kgms⁻¹
The constant force exerted by the players foot on the ball is 126 N
From the question,
We are to determine the change in momentum of the ball
Change in momentum calculated by using the formula,
[tex]\rho = m(v-u)[/tex]
Where [tex]\rho[/tex] is the change in momentum
[tex]m[/tex] is the mass
[tex]v[/tex] is the final velocity
and [tex]u[/tex] is the initial velocity
From the given information,
[tex]m = 0.42 \ kg[/tex]
[tex]u = 12 \ m/s[/tex]
[tex]v = 18 \ m/s[/tex]
Therefore,
Change in the ball's momentum,
[tex]\rho = 0.42 (18-12)[/tex]
[tex]\rho = 0.42 (6)[/tex]
[tex]\rho = 2.52 \ kgms^{-1}[/tex]
Hence, the change in the ball's momentum is 2.52 kgms⁻¹
For the force exerted by the players foot
Force is given by change in momentum with time
That is,
[tex]F = \frac{\rho}{t}[/tex]
Where
[tex]F[/tex] is the force
[tex]\rho[/tex] is the change in momentum
and [tex]t[/tex] is the time
From the given information
[tex]t = 0.020 \ s[/tex]
Therefore,
[tex]F = \frac{2.52}{0.020}[/tex]
[tex]F = 126 \ N[/tex]
Hence, the constant force exerted by the players foot on the ball is 126 N
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A cyclist reduces his speed from 6.5 m/s to 0.0 m/s with an acceleration of
a -1.2 m/s². How long does that take?
Answer:
a= -1.2 m/s^2
Vi= 6.5 m/s
Vf= 0 m/s
t= 0-6.5/-1.2= 5.45 Sec
Explanation:
Imagine a universe in which, like in ours, there are two kinds of charges (positive and negative), with the like charges repelling and unlike charges attracting each other, but with the electric force somewhat different from Coulomb's Law. Instead of varying with inverse distance squared, the force between charges in this imagined world would vary with the inverse distance cubed. In such a universe, would the static charges still always be distributed on the surfaces of conductors?
Answer:
the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
Explanation:
In this hypothetical system the electric force is of type
F = [tex]k' \frac{q_1 q_2 }{r^2}[/tex]
in this case the force decays to zero much faster,
if we call Fo the force of Coulomb's law
F₀ = [tex]k \frac{q_1 q_2 }{r^2}[/tex]
assuming the constant k is the same
the relationship between the two forces is
F / F₀ = 1 / r
F = F₀ / r
when analyzing this expression the force decays much faster to zero.
In an electric conductor, charges of the same sign may not feel any repulsive force from other charges that are at a medium distance, so there is a probability that some charges are distributed in the volume of the material, this does not happen with coulomb's law
Consequently, the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
What happens to waves near the shore?
Answer As a wave travels across the open ocean, it gains speed. When a wave reaches a shallow coastline, the wave begins to slow down due to the friction caused by the approaching shallow bottom. ... Think of it like driving a car at high speed and then slamming on the breaks. Everything is going to fly to the front.:Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. ... Eventually the bottom of the wave slows drastically and the wave topples over as a breaker. hope this helps have a nice night❤️❤️❤️
Explanation:
Since the universe is infinite, the probability of events and reoccurrence is infinite. So that means that there is a chance, if not 100% chance, that SOMEWHERE there is another earth, with another you, living the same life, at the same time. What are your thoughts about this??? that's so crazy to me
Answer:
That insane it might be true because a planet sometimes quoted to be an Earth 2.0 or Earth's Cousin based on its characteristics; also known by its Kepler Object of Interest designation KOI-7016.01) is an exoplanet orbiting the Sun-like star Kepler-452 about 1,402 light-years (430 pc) from Earth in the constellation Cygnus.
Explanation:
how do crumple zones extend the deceleration of a car?
how do crumple zones help redistribute the force of an impact?
Answer:
Uv rays
Explanation:
ultraviolet rays of the suun gives force
Answer:
what zones
Explanation:
A cube has a volume of 583cm^3. What is the length of one side?
Answer:
shdkahfkkfrgs
Explanation:
:)
1. Identify a region in the USA that is likely to be a large producer of natural gas.
Answer:
The top producing states are Texas, Oklahoma, New Mexico, Wyoming, and Louisiana, which produce more than 50 percent of U.S. natural gas
The top states in USA that is likely to be a large producer of natural gas is Texas. The 24 .6 % of the overall production of natural gas is in Texas.
What is natural gas ?Natural gas is a type of fossil fuels. It is highly flammable hydrocarbon primarily consists of methane gas. In 2016, natural gas accounted for 33 percent of all energy produced in the US, making it the greatest energy source in the nation.
Since July 2015, natural gas has become the main fuel used to generate electricity in the US. With an average wellhead value of $2.66 per thousand cubic feet and a total wellhead value of $67.3 billion, the United States produced 25.3 trillion cubic feet of marketed natural gas in 2012.
The top 5 natural gas producing states in US are Texas, Pennsylvania, Louisiana, West Virginia, Oklahoma. In which the top one is Texas.
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May you please help me?
Answer:
The first one is 9 times the original
The second one is 1/2 times
The third one is 1/3 times
need help its do today
Answer:
the answers for the first 3 are
C
A
C
Explanation:
Which natural hazards are most likely to affect Florida, due to its geography? Check all that apply. PLS HELP! I WILL GIVE BEST ANSWER BRAINLIEST! 15 POINT EACH! PLS HELP!
Answer:
drought, floods, rip currents, tropical cyclones, wildfires
Explanation:
right on edge
what hapenes to the wavelength of a wave if the frequency of the wave is increased?
Answer: The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
what do fluorine, sodium, and aluminum have in common
what equation links charge flow, current and time?
I will award Brainliest if CORRECT!
Answer:
Q=it
Explanation:
[tex] \purple {\bold {Q = it}} [/tex] is the equation equation that links charge flow, current and time.
Here,
Q = Charge
i = current
t = time
What information about elements can be collected from the periodic table?
Answer:
Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon's atomic mass to determine how many carbon atoms there are in a 1 kilogram block of carbon.
Explanation:
HOPE THIS HELPS LIKE AN RATE PLZ
Answer:
Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.
Explanation:
please mark brainliest please
A man drives south to work every
day. If his 55 mile commute
usually takes 0.75 hours, what is
his average velocity?
The man's average velocity is 73.3 mph (miles per hour).
What is average velocity?Average velocity is a measure of the rate of displacement of an object in a given direction. It is the total displacement of the object divided by the total time taken to cover that displacement. In other words, it is the distance an object travels divided by the time it takes to travel that distance. Average velocity is an important concept in physics, as it can provide insight into the motion of an object and the forces acting upon it. Average velocity can be calculated using the equation: velocity = displacement/time.
This can be calculated by dividing the distance (55 miles) by the time (0.75 hours). Mathematically, this can be expressed as:
velocity = (distance / time)
velocity = (55 miles / 0.75 hours)
velocity = 73.3 mph
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13 A lawn-mower is pushed with a force of 50 N.
If the angle between the handle of the mower
and the ground is 30°,
(i) Calculate the magnitude of the force that
is pressing the lawn-mower directly into
the ground.
(ii) Calculate the magnitude of the effective
force that moves the mower forward.
(iii) Why does the lawn-mower move forward
and not downward into the ground?
Answer:
13. (i) The magnitude of the force that is pressing the lawn-mower directly into the ground is 25 N
(ii) The magnitude of the effective force that moves the mower forward is approximately 43.3 N
(iii) Because there are no net downward force acting on the lawn-mower
Explanation:
13. The given force pushing the lawn-mower = 50 N
The angle at which the force acts = 30° to the ground
The component of the pushing force are;
(i) The magnitude of the force that is pressing the lawn-mower directly into the ground = The vertical component of the pushing force
The vertical component of the pushing force, [tex]F_y[/tex] = 50 N × sin(30°) = 25 N
∴ The magnitude of the force that is pressing the lawn-mower directly into the ground = [tex]F_y[/tex] = 25 N
(ii) The magnitude of the effective force that moves the mower forward = The horizontal component of the pushing force
The horizontal component of the pushing force, Fₓ = 50 N × cos(30°) = 25·√3 N ≈ 43.3 N
∴ The magnitude of the effective force that moves the mower forward = 25·√3 N ≈ 43.3 N
(iii) The lawn mower moves forward and not downwards because according to Newton's first Law of motion, the lawn-mower moves forward because it is being acted on by a net forward directed horizontal force
However, according to Newton's third law, the reaction of the ground is equal to the weight of the lawn mower, therefore, there are no net vertical force acting on the lawn-mower, such that the lawn-mower remains in the initial horizontal level and does not move downward into the ground.
Identify the medium an electromagnetic wave travels the fastest in.
empty space or vaccum the Electro magnetic wave travels the fastest.
What is the frequency of a wave with a wavelength of 12 meters and a velocity of 4 m/s?
Answer:
0.33 hz
Explanation:
the formula for the frequency in this situation is f=v/wavelength
PLEASE HELP ME! do tectonic plates play a major or minor role in the ROCK CYCLE
Answer: All igneous rocks the basis of the rock cycle is formed by plate tectonics. ... This movement from igneous to sedimentary back to igneous is a major part of the rock cycle. The heat from the mantle that fuels plate tectonics causes both igneous and sedimentary rocks to be turned into metamorphic rocks.
Explanation: BRAINLEST?
If you are at the top of a hill on a roller coaster at rest and you are able to complete a loop with a radius of 30 m,
a) find the minimum speed to complete the loop (hint: this is a circular motion problem)
b) find the minimum height of the hill to complete the loop
Answer:
Explanation:
People are wild about amusement parks. Each day, we flock by the millions to the nearest park, paying a sizable hunk of money to wait in long lines for a short 60-second ride on our favorite roller coaster. The thought prompts one to consider what is it about a roller coaster ride that provides such widespread excitement among so many of us and such dreadful fear in the rest? Is our excitement about coasters due to their high speeds? Absolutely not! In fact, it would be foolish to spend so much time and money to ride a selection of roller coasters if it were for reasons of speed. It is more than likely that most of us sustain higher speeds on our ride along the interstate highway on the way to the amusement park than we do once we enter the park. The thrill of roller coasters is not due to their speed, but rather due to their accelerations and to the feelings of weightlessness and weightiness that they produce. Roller coasters thrill us because of their ability to accelerate us downward one moment and upwards the next; leftwards one moment and rightwards the next. Roller coasters are about acceleration; that's what makes them thrilling. And in this part of Lesson 2, we will focus on the centripetal acceleration experienced by riders within the circular-shaped sections of a roller coaster track. These sections include the clothoid loops (that we will approximate as a circle), the sharp 180-degree banked turns, and the small dips and hills found along otherwise straight sections of the track.
I AM TIMED !! 30 POINTS Which is the smallest possible particle of an element?
O molecule
O atom
O compound
O matter
Answer:
atoms
Explanation:
they are the smallest
Calculate the wavelength of light that has a frequency of 5.2 x 1012 1/s.
Answer:
Wavelength = 5.77 * 10^-5 meters.
Explanation:
Given the following data:
Frequency of light = 5.2 *10^12 Hz
We know that the Speed of light = 3.0 * 10^8 m/s
To find the wavelength of light;
Mathematically, wavelength is calculated using this formula;
[tex] Wavelength = \frac {speed}{frequency} [/tex]
Substituting into the equation, we have;
[tex] Wavelength = \frac {3*10^{8}}{5.2 *10^{12}} [/tex]
Wavelength = 5.77 * 10^-5 meters.
Big sound is heard in bathroom than in a living room
Answer
That doesn't make any sense.
Explanation:
How much energy is transferred electrically by a 2000 W cooker in half an hour?
Responder:
E = 1440 kJ
Explicación:
Se da que,
La potencia de un horno de cocción es de 800 W
El voltaje al que se opera es de 230 V
Tiempo, t = 30 minutos = 1800 segundos
Necesitamos encontrar la energía eléctrica utilizada por el horno de cocción. El producto de la potencia y el tiempo es igual a la energía consumida. Entonces,
A sledgehammer is an example of what kind of simple machine?
A. Wheel and axle
o
B. Screw
c
C. Wedge
D. Lever
SUS
I am 95 percent sure the answer in C
Answer: C
Explanation:
3.00 m3 of a fixed mass of a gas at 150 kPa. Calculate the pressure if the volume is reduced to 1.20 m3 at a constant temperature.
Answer:
P₂ = 375 kPa.
Explanation:
Given that,
Initial volume, V₁ = 3 m³
Initial pressure, P₁ = 150 kPa
Final volume, V₂ = 1.2 m³
We need to find the final pressure.
At constant temperature,
[tex]P\propto \dfrac{1}{V}\\\\P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{150\ kPa\times 3\ m^3}{1.2\ m^3}\\\\P_2=375\ kPa[/tex]
So, the new pressure is 375 kPa.
A person on a daily diet of 2,500 calories should get no_more than
calories from fat each day.
Answer:
35%
Explanation:
Answer:
its 83
Explanation:
6. The transfer of thermal energy by radiation does not require matter.
O True
O False
Answer:false
Explanation:
please help me answer this
Answer:
A is the correct answer
Hope it helps
An illustration of the major tectonic plates is provided below.
Which of the labeled plates is the North American Plate?
A
Plate A
O
B
Plate B
c
Plate C
Plate D
Answer:
Plate A
Explanation: It has the continent of North America inside of it.
Answer:
its A
Explanation:Promise I did this rn and got it right