5
A football player kicks a 0.5 kg stationary football with a force of 60 N.
What is the force exerted on the player's foot by the football?

Answer:

The starting height of the ball is approximately 0.604 m

Explanation:

The given parameters are;

The mass of the the ball = 0.050

The speed with which it travels through the top loop = 2 m/s

The given height at which the ball moves at 2 m/s = 0.40 m

Therefore, we have;

1/2·m·v² = m·g·h

1/2·v² = g·h

h = 1/2·v²/g = 1/2 × 2²/9.81 ≈ 0.204

The additional height = h = 0.204 m

Therefore;

The starting height of the ball  ≈ The given height at which the ball moves at 2 m/s + h

The starting height of the ball  ≈ 0.40 + 0.204 = 0.604 m

The starting height of the ball ≈ 0.604 m.

When any object in rest, then potential energy is present. But when object is in motion then object have kinetic energy.

Starting height of the ball is 0.604 m.

We know that, when any object is start from rest, then potential energy is converted into kinetic energy.

     \(\frac{1}{2}mv^{2} =mgh\)

Where m is mass of object, g is gravitational acceleration , h is height and v is velocity of object. (value of g = 9.81 m/ second square)

from above equation,

we get,     extra height        \(h=\frac{v^{2} }{2g} \\\\h=\frac{4}{2*9.81}\\\\h=0.204\) meter

The starting height of the ball will be sum of the height at which ball moves 2 m/s and extra height.

Starting height = 0.40 + 0.204 = 0.604 meter.

Learn more:

https://brainly.com/question/18963960

If the gravitational force between two spheres of radius r was 10 N, then the gravitational force between two spheres of radius 3r would be: 10/8 = 1.25 N.

The magnitude of the gravitational force that two solid spheres of radius 3r made of the same type of steel will exert on each other when placed in contact is 8 times the magnitude of the gravitational force that two solid spheres of radius r made of the same type of steel would exert on each other when placed in contact.

This is because the gravitational force between two objects is inversely proportional to the square of the distance between them, and since the distance between the two spheres of radius 3r is 8 times the distance between two spheres of radius r, the gravitational force will be 8 times smaller.

The equation for the gravitational force between two objects is given by F = G*m1*m2/r^2, where G is the gravitational constant, m1, and m2 are the masses of the two objects, and r is the distance between the two objects.

Therefore, since the distance between the two spheres of radius 3r is 8 times greater than the distance between the two spheres of radius r, the gravitational force between them will be 8 times smaller than the gravitational force between the two spheres of radius r.

For example, if the gravitational force between two spheres of radius r was 10 N, then the gravitational force between two spheres of radius 3r would be 10/8 = 1.25 N.

To know more about magnitude refer here:

https://brainly.com/question/15681399#

#SPJ11

The force of magnitude 22N will also be double to a magnitude of 44N when the mass of one of the bodies is doubled.

The gravitational force of any two bodies is given by,

F = GMm/R²

Where,

M and m are the masses of the bodies,

R is the distance between them and G is the universal gravitational constant.

Currently the force of gravitation between two bodies is given to be 22N.

Now, if one of the mass is doubled, let say M = 2M, so the new force will be,

F' = G(2M)m/R²

F' = 2GMm/R²

Putting F = GMm/R²,

F' = 2F

So, the force of gravitation between the two bodies will be doubled. So, the new force will be 44N.

To know more about gravitation, visit,

https://brainly.com/question/557206

#SPJ4

Answer:

The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

Explanation:

Given that,

First charge = 40 μC

Second charge = 80 μC

Distance between the two particles = 2.0 m

Kinetic energy = 16 J

We need to calculate the distance separating the two particles when the moving particle is momentarily stopped

Using conservation of energy

\(K.E+\dfrac{kq_{1}q_{2}}{d}=\dfrac{kq_{1}q_{2}}{x}+K.E\)

Put the value into the formula

\(16+\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{2}=\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{x}+0\)

\(16+14.4=\dfrac{28.8}{x}\)

\(30.4x=28.8\)

\(x=\dfrac{28.8}{30.4}\)

\(x=0.947\ m\)

Hence, The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.

The given parameters;

The kinetic energy is zero at the instant the moving particle is momentarily stopped.

The distance separating the two particles when the moving particle is momentarily stopped is calculated as follows;

\(K.E_1 \ + W_1 = K.E_2 + W_2\\\\K.E_1 + \frac{kq_1q_2}{x_1} = K.E_2 + \frac{kq_1q_2}{x_2} \\\\16 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{2} = 0 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{x_2} \\\\30.4= \frac{28.8}{x_2} \\\\x_2 = \frac{28.8}{30.4} \\\\x_2 = 0.947 \ m\)

Thus, the distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.

Learn more here:https://brainly.com/question/16252268

The net force applied to it is 6311.9 N.

To calculate the net force to the car, first, we need to find the acceleration using the equation of motion.

Force: This as be defined as the product of mass and acceleration of a body. The S.I unit of force is Newton (N)

⇒ Formula

⇒ Where:

From the question,

 ⇒Given:

⇒ Substitute these values into equation 1

⇒ Solve for a

⇒ To get the force, we use the formula below

⇒ Where:

⇒ Given:

⇒ Substitute these values into equation 2

Hence the net force applied to it is 6311.9 N.

Learn more about force here: https://brainly.com/question/13370981

The region of the ultraviolet spectrum absorbed least by the atmosphere is UVC.

UVC radiation, with wavelengths between 100 and 280 nanometers, is mostly absorbed by the Earth's atmosphere, specifically by the ozone layer. This absorption prevents UVC radiation from reaching the Earth's surface in significant amounts. On the other hand, UVA and UVB radiation are partially absorbed by the atmosphere, but they still reach the Earth's surface to varying degrees. UVA has longer wavelengths (315-400 nm) and is less absorbed than UVB, which has shorter wavelengths (280-315 nm). However, it's important to note that excessive exposure to both UVA and UVB radiation can have harmful effects on human health, such as skin damage and an increased risk of skin cancer. Therefore, it's crucial to protect oneself from UV radiation by using sunscreen, wearing protective clothing, and seeking shade when necessary.

To know more about ultraviolet spectrum, click herehttps://brainly.com/question/3560976

#SPJ11

The angular speed of the rear wheels is 2.72 rad/s.

In a tricycle, the front wheel and the rear wheels are connected, so the linear speed for both wheels is the same.

v₁ = v₂

ω₁ R₁ = ω₂ R₂

Convert the angular speed of the front wheel

ω₁ = 16 rpm

ω₁ = 16 × (2π ÷ 60) rad/s

ω₁ = 32 × 3.14 ÷ 60

ω₁ = 1.675 rad/s

Calculate the angular speed of the rear wheels

ω₁ R₁ = ω₂ R₂

1.675 × 13 = ω₂ × 8

ω₂ = 21.775 ÷ 8

ω₂ = 2.72 rad/s

Learn more about angular speed here: https://brainly.com/question/15061250

#SPJ4

Answer:

B.

I think.

Explanation:

Mars doesn't have that much of an atmosphere!

Have a great day!

The smallest planet among the inner planets is Mercury. It is the closest planet to the sun and has a diameter of approximately 4,880 km, which is just over one-third the size of Earth.

Mercury is also the second densest planet in the solar system, after Earth.

To know more about Mercury , check out :

https://brainly.com/question/24257702

#SPJ4

Answer: left side

Explanation:

Given

Block of wood is pushed to the right

As friction always resist the motion, it must be acting towards the left side to stop the block

Answer:

The answer is A, I just took the quiz :)

ik you already got the answer, but just in case anyone else who gets this question looks here, the person who said A was right!!

The total mass of the product nuclei is greater than the mass of the target nucleus

"Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of uranium fissions by splitting into two smaller nuclei, along with a few neutrons, the release of heat energy (kinetic energy of the nuclei), and gamma rays."

"Change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle. The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion."

Know more about nuclear reaction here

https://brainly.com/question/12786977

#SPJ2

Answer:

To answer your question:

a) The formula to calculate the number of wavelengths within a laser pulse is:

number of wavelengths = pulse duration / wavelength

Plugging in the values given in the question, we get:

number of wavelengths = 38 ps / 1062 nm

Converting picoseconds to seconds and nanometers to meters, we get:

number of wavelengths = 38 x 10^-12 s / 1062 x 10^-9 m

number of wavelengths = 0.0358

Therefore, there are approximately 0.0358 wavelengths within the laser pulse.

b) To fit only one wavelength, the pulse duration would need to be equal to the wavelength. The formula to calculate the pulse duration is:

pulse duration = wavelength

Plugging in the value given in the question, we get:

pulse duration = 1062 nm

Converting nanometers to picoseconds using the speed of light ©, we get:

pulse duration = wavelength / c

pulse duration = 1062 x 10^-9 m / 3 x 10^8 m/s

pulse duration = 3.54 x 10^-12 s

Therefore, the pulse would need to be approximately 3.54 ps long to fit only one wavelength.

I hope this helps

Answer:

The SI unit of work is Joule

Answer:

S.I. unit of work is Joule. Work done when a force of 1 Newton displaces the body through a distance of 1 metre in the direction of force.

Explanation:

The work was done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\) and at an angle of \(29^o\) 42.83 J.

When an object is moved over a distance by an external force, at least some of that force must be applied in the direction of the displacement. This is known as work in physics. Work may be estimated if the force acting along the path is constant by multiplying the length of the path by the component of the force acting along the path.

To express this formally, the work W is equal to the force f times the length d, or W = fd. The work is W = fd cos if the force is applied at an angle to the displacement.

Given:

The mass, m = 2 kg,

The acceleration, g = 9.81 \(m/s^2\),

θ = angle between block and surface kinetic friction = μ

Calculate the work done by the formula given below,

\(W_{fy}\) = F sinθ

\(W_{fy}\) =  (\(mgsin\)θ)/ (sinθ -  μ * cosθ)

Substitute the values

\(W_{fy}\)  = \((2*9.81 sin29^{o} )/sin29^o - 0.30cos29^o\)

\(W_{fy}\)  = 42.83 J

Therefore, the work done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\), and at an angle of \(29^o\) is 42.83 J.

To know more about Work done:

https://brainly.com/question/13662169

#SPJ1

Answer:

current must flow and chemical energy must take place

Answer:

Earth will complete more revolutions than Saturn.

Explanation:

I just did it :)

Answer: \(-\frac{1}{2}\times \frac{d[Br^.]}{dt}=+\frac{d[Br_2]}{dt}\)

Explanation:

Rate of a reaction is defined as the rate of change of concentration per unit time.

Thus for reaction:

\(2Br^.\rightarrow Br_2\)

The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

\(Rate=-\frac{d[Br^.]}{2dt}\)

or \(Rate=+\frac{d[Br_2]}{dt}\)

Thus \(-\frac{d[Br^.]}{2dt}=+\frac{d[Br_2]}{dt}\)

(a) The center mass when the connecting rod is massless is 0.5 m.

(b) The center mass when the connecting rod has a mass of 15 kg is 0.47 m.

The center mass of m1 is calculated by applying the following formula for center of gravity.

Cm = ( m1x₀  + m2x₁ ) / ( m1 + m2 )

when the connecting rod is massless,

Cm = ( 15kg x 0   +  25kg x 0.8 m ) / ( 15 kg + 25 kg )

Cm = 0.5 m

when the connecting rod has a mass of 15 kg;

Cm = ( 15 kg x 0  +  15 kg x 0.4 m  +  25 x 0.8 m ) / ( 15 kg + 15kg + 25 kg )

Cm = 0.47 m

Learn more about center mass here: https://brainly.com/question/13499822

#SPJ1

Answer:

The resistance ratio of first conductor to the second conductor is 1 : 2.

Explanation:

Current in first conductor = I1

Current in second conductor = I2 , I1 = 2 I2

According to the Ohm's law

\(V= I_1R_1..... (1)\\V = I_2 R_2 .... (2)\\\)

From (1) and (2)

\(I_1 R_1 = I_2 R_2\\\\2I_2 R_1 = I_2 R_2\\\\2 R_1 = R_2\)

1)Average speed = 8y/s

2)Average velocity= 0.88y/s

Average speed depends on the distance whereas average velocity depends on the displacement . Speed is a scalar quantity while average velocity is a vector quantity.

Let us assume, L=100 yards as the length of the football field.

1)We know that average speed is the total distance covered by the player divided by the time taken.

Total distance covered to go from one goal line to the other and then back to the 20-yards line is:

s= 100y + (100-20)y

= 100y+ 80y

=180y

Given, time t=22.5 s,

Now, the average speed of the player is:

v= s/t

= 180y/22.5

= 8 y/s

2)To calculate the magnitude of average velocity, we have to consider the direction and sign of the velocity.

In the beginning, the player goes from one goal line to the other one, so he covers 100 y. But, in the second part of the motion he goes back by 80 y. Hence, the net displacement of the player is:

s= 100y-80y= 20y

now, the average velocity is:

v= s/t

=20/22.5

= 0.88 y/s.

To know more about average speed and velocity, refer

https://brainly.com/question/4931057

#SPJ4

Science and technology have had a significant influence on society, with both successes and difficulties.

The achievements can be noted as -

The challenges can be noted as -

Read more about science and technology on:

https://brainly.com/question/28497175

#SPJ1

To keep the crate moving at constant velocity, you need to apply a constant force.

The easiest way to do this is by pushing on the crate with an object that has a mass of at least 100 grams. The force you apply will depend on how fast the crate is moving relative to you and how far away it is from your starting position.

For example, if you were holding a crate that was moving forward at 10 m/s and it was 5 m away from where you started, then your initial push should be around 0.5 newtons (N).

If the crate moves at 10 m/s when it's 5 m away from where you started, then your initial push should be around 0.25 N. That means that if we assume that the crate starts out moving at 10 m/s and that there's no friction between the two objects involved in this experiment (which would make things more complicated), then we can use this equation:

F = ma

To learn more about velocity visit: https://brainly.com/question/18084516

#SPJ4

Answer:

The capacitor helps to store data even after the battery is removed

Explanation:

The cell phone is fitted with different types of capacitors, which come in all shapes and sizes. However they come, their main function is to store charges within them, and dissipate these charges when necessary.

This serves a great purpose in the printed circuit boards of phones as they provide the power needed for data to be stored even when the battery of the phone is removed.

A capacitor is a solid-state device because it has no moving part. It just stores charges within its parallel plates for the phone until the power is needed.

Answer:

D

Explanation:

The bowling ball has a greater mass, so there's more stuff for gravity to act on. In that sense, gravity is pulling on it more. But it still doesn't fall any faster

Answer:

D: The acceleration of the gold ball will be greater than that of the bowling ball.

Hopefully this is right

Explanation:

The ball is lighter and bowling ball is heavy

Answer:

Usually a stopwatch is used to measure the time interval of each second. ... The amount of ticks 1 second and the amount of subdivision are adjusted so that the least count of the watch is 0.2 s or 0.1 s. A stop watch is a more sensitive device than a stop clock.

Answer:

a 15.6voltz

i Hope this helps

If you have two different sized velocity vectors representing two objects moving in the same direction, then you can conclude both B and C are correct.

A velocity vector is the rate of change of an object's position. A velocity vector has both magnitude and direction. The magnitude of the velocity vector gives the speed of the object while the direction of the vector gives the direction of the object's velocity.

If a vector's size is longer than the other, it means that the vector has a magnitude higher than the other. If the magnitude is higher, the velocity will be higher.

Therefore, if you have two different sized velocity vectors representing two objects moving in the same direction, then you can conclude both B and C are correct.

To know more about velocity vector

https://brainly.com/question/13492374

#SPJ1

Answer:

C. Post your goals in an obvious place

Explanation:

Being able to look at your goals and check in on the progress of those goals in a place you know where they are so there's no worrying if you might have forgotten one or two and or havent done them is a good way to stay active and keep motivated with your goals. Making notes or specifications on those goals and trying to think over goals is also something you should do. Ignoring or forgetting your goals because you didnt write them down or put them in a secure place can ruin motivation and make you tired cause keeping track of those goals become a chore.

A high CVP reading indicates an elevated pressure in the central veins, which can be a sign of several medical conditions such as heart failure, dehydration, or low cardiac output.

CVP stands for Central Venous Pressure, which is the pressure of blood in the central veins (such as the superior vena cava or the inferior vena cava) that return blood to the heart. Central venous pressure is frequently used as an examination of hemodynamic status, especially in the intensive care unit.

A healthcare professional should interpret the significance of a high CVP reading in the context of the patient's medical history and other test results.

To know more about heart, visit here:

https://brainly.com/question/28465505

#SPJ4