A football is kicked at ground level with a speed of 18.0 m/s at an angle of 31.0 to the horizontal. How much longer does it hit the ground?

Answers

Answer 1
The football hit the ground 2.11 seconds later.

Hope this helps

Related Questions

A 288-gram cart starts from rest and rolls down an inclined plane from a height of 1.226 m. Determine its speed (in m/s) at a height of 0.126 m above the bottom of the incline. Assume friction is negligible

Answers

The law of conservation energy

PE₁ + KE₁ = PE₂ + KE₂

From rest ⇒ v₁ = 0 ⇒ KE₁ = 0

Input the value:

PE₁ = PE₂ + KE₂

[tex]\tt mgh_1=mgh_2+\dfrac{1}{2}mv_2^2\rightarrow divide\:m\\\\gh_1=gh_2+\dfrac{1}{2}v_2^2\\\\9.8(1.226-0.126)=\dfrac{1}{2}v_2^2\\\\v_2=4.64\:m/s[/tex]

Help Me With This Question Please.

Thank you UwU​

Answers

8Ω, 9Ω, xΩ are in series

[tex] \therefore \: R _{1} = 8 + 9 + x = (17 + x)Ω[/tex]

3Ω and 5Ω are in series

[tex] \therefore \: R _{2} = 3+ 5 = 8Ω[/tex]

Now equivalent resistance of R1 and R2 which are parallel in R3 = 6Ω

[See The Attachment]

[tex] \therefore \frac{1}{R _{3}} = \frac{1}{R _{1}} + \frac{1}{R _{2}} \\ \\ \therefore \: \frac{1}{6} = \frac{1}{(17 + x)} + \frac{1}{8} \\ \\ = \frac{1}{17 + x} = \frac{1}{6} - \frac{1}{8} = \frac{1}{24} \\ \\ \therefore17 + x = 24 \\ x = 24 - 17 = 7 \\ x = 7Ω[/tex]

Hope This Helps!!

The value of the resistance X is 7 ohms.

Equivalent resistance in series

The equivalent resistance in series is calculated as follows;

R₁ = 8 + 9 + x = 17 + x

R₂ = 3 + 5 = 8

Equivalent resistance in the circuit

The equivalent resistance in the circuit is calculated as follows;

[tex]\frac{1}{R} = \frac{1}{R_1}+ \frac{1}{R_2} \\\\R = \frac{R_1 R_2}{R_1 + R_2} \\\\[/tex]

[tex]R(R_1 + R_2 ) = R_1 R_2[/tex]

6(17 + x + 8) = 8(17 + x)

150 + 6x = 136 + 8x

14 = 2x

x = 7

Thus, the value of the resistance X is 7 ohms.

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What are some of the major pieces of evidence for the theory of plate tectonics? How does the theory explain these observations?

Answers

Answer:

evidence:

- fossils found in different parts of the world were the same

- weather patterns in different parts of the world

- mountain ranged with the same rock types, structures, and ages are now on opposite sides of the atlantic ocean

- coal was found in cold climates where it could not have formed

-scratches from glaciers were found in a desert

- continents fit like a puzzle

- identical rocks of the same type and age found on both sides of the atlantic ocean

How many feet up high should I be required to wear a harness?

Answers

Answer:

About 6 feet or higher is recommended.  

Explanation

how do i explain why two balls have the same velocity if they are rolling down the same slope but they started in different positions?

Answers

Answer:

When two balls are equally weighted, no matter where they are placed on a ramp, they will travel at the same speed. One will just reach the ground quicker.

Explanation:

A baseball with mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time?

Answer Choices:
−2.8 m/s2
−9.8 m/s2
−12.6 m/s2
−7.0 m/s2

Answers

Answer:

It is -7.0 m/s2

Explanation:

Just did it

A baseball of mass 0.145 kg is thrown with the force of 0.4 N then the acceleration of the baseball will be equal to 2.8 m/s².

What is acceleration?

The rate of change in an object's velocity concerning time is known as acceleration in mechanics. The vector quantity of accelerations. The direction of the net force that is acting on an object determines its acceleration.

Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well. The definition of acceleration is the change in velocity vector over a time interval divided by the time interval.

As per the instructions given in the question,

Force, f = 0.4 N

Mass, m = 0.145 kg

F = ma

a = f/m

a = 0.4/0.145

a = 2.8 m/s².

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A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3 × 103 N/m. The block slides down the ramp and compresses the spring.

Required:
Find the maximum compression of the spring.

Answers

The maximum compression of the spring is 0.146 m.

Work Energy theorem

The work done by the block when it slides down the ramp will be converted to elastic potential energy of the spring.

W = U

Fd = U

where;

F is the horizontal component of the block weight

mgsin(θ) x d = ¹/₂kA²

[tex]A^2 = \frac{2mg sin(\theta)d}{k} \\\\A = \sqrt{\frac{2mg sin(\theta)d}{k}} \\\\A = \sqrt{\frac{2(5 \times 9.8) sin(30)\times 1.3}{3\times 10^3}}\\\\A = 0.146 \ m[/tex]

Thus, the maximum compression of the spring is 0.146 m.

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Ben and Dan both weigh 600 N. They are doing pull-ups together. Each pull-up is 0.5 meters of distance. How much work do they each do for every pull-up? 300 J 600 J 1200 J 1500 J

Answers

Answer:

300 J

Explanation:

Work = (Force)*(distance) = 600 N ∗ 0.5 m = 300 J

As a boy pulls a sled carrying his sister, he exerts a force of 2.6 lbs.at an angle of 30 degrees with the ground. How much work does he do if he pulls her at a constant speed for exactly one-half mile (2640 ft)?

Answers

The amount of work done by the boy in pulling the sled is 8064.41 J

Definition of work done

Workdone is defined as the product of force and distance moved in the direction of the force. It can be expressed mathematically as:

Workdone (Wd) = force (F) × distance (d)

Wd = Fd

Considering angle projection,

Wd = FdCosθ

How to determine the workdone Force (F) = 2.6 lb = 2.6 × 4.448 = 11.5648 NDistance (d) = 2640 ft = 2640 × 0.305 = 805.2 mAngle (θ) = 30°Workdone (Wd) =?

Wd = FdCosθ

Wd = 11.5648 × 805.2 × Cos 30

Wd = 8064.41 J

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What is the magnitude of the electric field strength at a position that is 1.2 m from a point charge of 4.2 \times 10^{-6} \mathrm{C}4.2×10
−6C?

Answers

Answer:

lil durk a goat

Explanation:

Identify the region of the electromagnetic spectrum where the wavelength measurement of 7.5 nm can be found.

Answers

We have that the  electromagnetic spectrum where the wavelength measurement is 7.5 nm is the X-ray

X-ray

Option D

Question Parameters:

the wavelength measurement of 7.5 nm can be found

Generally, gamma rays has its wavelength around 10pm.

The microwaves has its wavelength around 1cm.

The ultraviolet has its wavelength around the 400nm.

The range of the X-rays is between to 5nm to 10nm.

Hence,the electromagnetic spectrum where the wavelength measurement is 7.5 nm is the X-ray

X-ray

Option D

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CQ

Identify the region of the electromagnetic spectrum where the wavelength measurement of 7.5 nm can be found.

A) Gamma rays

B) Microwaves

C) Ultraviolet

D) X-rays

E) Visible light

what is an example of friction on an object in motion?

Answers

A ball rolling on a carpet!

Answer:

Friction drag force causes objects to slow down as they move through a fluid, such as air or water. ... As an object's speed increases, the drag force from the fluid increases exponentially. • For example, when you drive at high speeds, the frictional force of air on the car increases, and fuel economy decreases.

If you are driving 80 km/h along a straight road and you look to the side for 2.1 s , how far do you travel during this inattentive period?

Answers

Velocity = displacement / time

First, Always make sure that your units for things are the same. In this question, we are given time in seconds and hours. So, we need to make them all use 1 unit.

I will do seconds.

To convert 80km/h to m/s, divide by 3.6.

22.2222…. m/s = displacement / 2.1s

Multiply by 2.1s on both sides

46.6666……m = displacement

You travelled 47 meters.

helphelphelphelphelphelphelphelp

Answers

Answer:

a is slower

b is constant

c is faster

A cannonball is shot (from ground level) with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 30 m/s. What's the maximum height reached by the cannonball

Answers

Answer:

maximum height =  46m

Explanation:

Vx = 20m/s

Vy = 30 m/s

gravity = 9.8 m/s/s

final velocity = initial velocity - gravity • time

0 = 30m/s - 9.8m/s/s • time

subtract 30m/s from both sides

-30m/s = - 9.8m/s/s • time

divide both sides by -9.8m/s/s

3.06 s = time

height =  initial velocity • time - 1/2 • gravity • time^2

height = 30m/s • 3.06s - 1/2 • 9.8m/s/s • 3.06s ^2

height = 46m

the maximum height is equal to 46m

A pump lifts water into an overhead tank at a height of 12m at a rate of 5kg/s,what is the power in the pump?



Answers

Answer:

600 watts

Explanation:

A wooden supply raft is 2 m wide, 3 m long and 0.200 m deep. The raft and it’s occupants have mass of 700 kg. How deep will the sink below the water when floating?

Answers

58.3% of the raft will sink below the water when floating.

Volume of the raft

The volume of the raft is calculated as follows;

V = Lbh

V = 2 x 3 x 0.2

V = 1.2 m³

Density of the raft

The density of the raft is calculated as follows;

ρ = m/v

where;

m is the mass = 700 kgv is the volume = 1.2 m³

[tex]\rho = \frac{700}{1.2} \\\\\rho = 583.33 \ kg/m^3[/tex]

Fraction of the raft below the water

[tex]f = \frac{\rho\ _{raft}}{\rho \ _{water}} \times 100\%\\\\f = \frac{583.33}{1000} \times 100\%\\\\f = 58.3 \%[/tex]

Thus, 58.3% of the raft will sink below the water when floating.

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What happens to an object’s momentum if its mass is reduced by half but its velocity remains the same?

Answers

If the mass of an object is halved and its velocity remains the same, its momentum will be halved.

What is momentum?

Momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity.

We can calculate the momentum of an object using the following expression.

p = m × v

where,

p is the momentum.m is the mass.v is the velocity.

The initial momentum of the object is:

p₁ = m₁ × v₁

If its mass is reduced by half but its velocity remains the same, the new momentum is:

p₂ = m₂ × v₁ = 0.5 m₁ × v₁ = 0.5 p₁

If the mass of an object is halved and its velocity remains the same, its momentum will be halved.

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- At time t = 0, a small ball is projected vertically upwards from a point A which is 24.5 m above the ground. The ball first comes to instantaneous rest at the point B, where AB = 19.6 m and first hits the ground at time t = T seconds. = The ball is modelled as a particle moving freely under gravity. (a) Find the value of T.​

Answers

The value of time needed to complete the upward and the downward motion is, T=5sec .T is the time at which the ball first hits the ground.

What is the time period?

The time period is found as the ratio of the displacement and the velocity. Its unit is second and denoted by t

The given data in the problem is;

The time required to move upwards is,t₁

The time required to move downwards is,t₂

The distance traveled is,s= 19.6m

The gravitational acceleration is, g=9.81 m/s

At the highest position, the velocity of the ball is zero;

The time required to move upwards is found as;

[tex]\rm S_1 = ut + \frac{1}{2} at^2 \\\\ \rm S_1 = \frac{1}{2} (-g)t_1^2 \\\\ t_1= \sqrt{\frac{2S_1}{g} } \\\\ t_1= \sqrt{\frac{2 \times 19.6 }{9.81} } \\\\ t_1= 2 \ sec[/tex]

The time required to move downward is found as;

[tex]\rm S_2 = ut + \frac{1}{2} at_2^2 \\\\ \rm S_1 = \frac{1}{2} (-g)t_2^2 \\\\ t_2= \sqrt{\frac{2S_2}{g} } \\\\ t_2= \sqrt{\frac{2 \times 44.1 }{9.81} } \\\\ t_2= 3 \ sec[/tex]

The total time period is the sum of the time required to move upwards and the time required to move downwards.

T =t₁+t₂

T=2+3

T=5 sec

Hence the value of T will be 5 sec.

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1. One light goes out, they all go out

correct answer:✅series


Voltage and current are directly related

wrong answers: no circuits and parallel

hint:More voltage from the battery pushes more current through.


resistance and current are directly related

wrong answers: all circuits and parallel

hint: If you have more resistance in a circuit, does the current go up? That's what would happen if they were directly related.


Voltage and resistance are unrelated

correct answer:✅all circuits


answer choices are series, parallel, all circuits, and no circuits


2.Which will make the electromagnet weaker?

correct answer:Unwrapping some of the coils.


3.Why do gases exert more pressure or increase their volume when the temperature is raised?

correct answer:At higher temperatures, the particles of a gas move faster. This increase in kinetic energy can increase the pressure and / or the volume of the gas.

hint: A few reminders of definitions from last semester:

Kinetic energy is the energy of motion.

Temperature is the average kinetic energy of the particles in a sample.

For a gas:

Temperature and pressure are directly related.

Temperature and volume are directly related.

Pressure and volume are inversely related.


4.Which group naturally achieves the octet rule without gaining or losing electrons?

correct answer:Noble gases


5.Label each as a physical or chemical property/change.

Shiny -✅physical

electrolyte -✅physical

highly reactive -✅chemical

In the presence of oxygen, will form carbon dioxide and water -✅chemical

maellable -✅physical

rusts -✅chemical

acid rain erodes statues and monuments -✅chemical


6.Which statement is true about the groups on the periodic table?

correct answer:The halogens have 7 valence electrons and form -1 ions.


7. Match the word to its definition.

the stuff that gets dissolved in a solution -✅solute

the stuff that does the dissolving in a solution -✅solvent

this determines the amplitude of a wave - ✅energy

the change in frequency of a wave as the object that is producing it moves towards or away from you -✅Doppler Effect

The material that a wave moves through-✅medium

Wave whose matter vibrates perpendicular to the direction the wave travels -✅ transverse

An atom of an element that has a specific number or neutrons, such as Carbon-14. -✅isotope


8.Check all true statements about the dog as it runs the obstacle course.

✅If the dog has the highest average speed, he will win the race.

✅A heavier dog will have a harder time changing direction on the course because it has more inertia than the small dog.

✅As the dog turns, his velocity changes as he changes direction.

( I got a 2.4 out of 4 on this questions, the other options were)

Whenever the dog speeds up, slows down, or changes direction, he is accelerating.

The dog's speed is constant throughout the race.

The weight of the dog will be the same if the competition was held on the moon.

If the doe can double his net force on an obstacle, his acceleration will be cut in half.

The mass of the dog will be the same if you take him to the international space station.

the wrong answer was❌The dog's velocity is constant throughout the race. because the speed and direction changed throughout, the velocity is not constant.

9.Match each atom with the correct element it represents. Make sure you are using your periodic table (Links to an external site.)
✅ Beryllium
✅ Lithium
✅ Helium
✅ Carbon
(image below is for question 9)

Answers

Explanation:

ndndndndnndndndndndndndnndndnd

Answer:

teysyshnk

Explanation:

Х
In which layer of
the soil do we
usually find
loam? to. Topsoil
b. Parent Soil c.
Bedrock d.
ground-soil

Answers

Answer:

A. topsoil the answer

Explanation:

I think its a correct answer

24. An elevator is moving vertically up with an acceleration a. The force exerted on the floor by a passenger of mass m is
(a) mg (b) ma (c) mg - ma (e) none of these (d) mg + ma​

Answers

Given :-

An elevator is moving vertically up with an acceleration a.

To Find :-

The force exerted on the floor by a passenger of mass m .

Solution :-

As the man is in a accelerated frame that is non inertial frame , we would have to think of a pseudo force .

The direction of this force is opposite to the direction of acceleration the frame and its magnitude is equal to the product of mass of the concerned body with the acceleration of the frame .

For the FBD refer to the attachment . From that ,

[tex] \implies Weight_{apparent}= mg + ma [/tex]

Hence option d is correct choice .

I hope this helps .

A ball is dropped from the top of a building.
When does the ball have the least potential energy?
O after it has hit the ground
O half way through the fall
O as it is released
O just before it hits the ground

Answers

Answer:

after it has hit the ground

.........

Answer: A. after it has hit the ground


Activity A:
Surviving a crash
Get the Gizmo ready
• Click Reset (?).
. On the DESIGN tab, check that Sedan is selected
Introduction: Modern vehicles contain features designed to keep passengers safe in a crash.
The crumple zone in the front of the car slows the car gradually and increases stopping time.
The safety cell is a rigid cage that prevents passengers from being crushed. Inside, seat belts
and airbags prevent the driver from hitting the windshield, steering wheel, or dashboard.
Question: How does a crumple zone help protect a passenger?
1
Make a hypothesis: On the DESIGN tab, look at the parameters you can control. What
settings do you think will make the safest car? Set up the Gizmo, and then fill in below.
Crumple zone length:
Crumple zone rigidity:
Safety cell rigidity:
Seat belt present?
If present, seat belt stiffness:
Air bag present?
If present, air bag rigidity:

Answers

The crumple zone help protect a passenger from injury by converting some of the kinetic energy possessed by the car into a controlled deformation, or crumpling when there is a crash.

What is impact?

The term impact refers to a large force that acts for a short time. Passengers in a vehicles sustain injuries after an accident due to the high impact of the crash.

As such, the crumple zone help protect a passenger from injury by converting some of the kinetic energy possessed by the car into a controlled deformation, or crumpling when there is a crash.

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Electric wires in between the poles are seen stretched in winter. Give Reason? ​

Answers

Electric wires/cables expand when temperature rises l

if i release one steel ball from the top of a ramp and the other ball from the 40cm mark will they have the same acceleration?

Answers

Answer:

Yes, they will also have the same acceleration. Acceleration is controlled by the amount of weight (def. amount of gravitational pull on a given object) that the ball has. For one ball to accelerate quicker than the other, it would need a propulsion element, which it does not.

Explanation:

Question 14 (1 point)
One star has a temperature of 20,000 K and another star has a temperature of 8,000
K. Compared to the cooler star, how much more energy per second (how many times
more energy) will the hotter star radiate from each square meter of its surface?

Answers

We have that the more energy per second to radiated by the hotter  is mathematically given as

Energy per second=256

Energy per second to radiated

Question Parameters:

One star has a temperature of 20,000 K

and another star has a temperature of 8,000

Generally the equation for the Energy per second   is mathematically given as

Energy per second is Proportional to T^4

Where

T=20000/8000

T=4

therefore

Energy per second=4^4

Energy per second=256

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The volume
of this ice
would be
considered
what type of
property?
A. a chemical property
B. a rare property
C. a physical property
D. an undetermined property

Answers

c. a physical property

Another elephant pushes with 3500 N on a load of trees. It then pushes these trees for 225 m. How much work did he elephant do?

Answers

Answer:

787, 500 N/m

Explanation:

Work = Force • displacement

[tex]Work = (3500 N)(225 m) = 787500\frac{N}{m}[/tex]

[tex]W = (3500 N)(225 m) = 787500\frac{N}{m}[/tex]


2. How are the speed, wavelength, and frequency of a wave related

Answers

Answer:

speed = wavelength * frequency

Explanation:

speed = wavelength * frequency

Other Questions
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You have to write each expression in expanded form Find the area of the parallelogram.4 in4 inA =in 2 Sten and Manu are at a mystery movie. The movie starts at 1:45 PM and ends at 3:40 PM. How long is the movie? PLEASE, I AM DESPERATE - I AM OFFERING 85 POINTS!!!Our knowledge of the properties and laws of physics shows no signs of approaching its ultimate boundaries. . . This increasing physical knowledge is now, rapidly converted by practical ingenuity, into physical power. . . . From this union of conditions, [we can] forward to a vast multiplication and long succession of [mechanical] contrivances for economizing labor and increasing its produce: and to an ever wider diffusion of the use and benefits of those contrivances.John Stuart Mill, British liberal political philosopher, Principles of Political Economy with Some of Their Applications to Social Philosophy, 1849a) Explain one way the author's point of view was shaped by his historical situation. b) Explain one way in which the passage provides evidence for an intellectual development of the nineteenth century.c) Explain one way in which Mill's prediction accurately described subsequent developments in the late nineteenth century. In the diagram of the five-paragraph essay, what do the two arrows indicate?A. the positions of the thesis statementB. the positions of the hook sentences C. the positions of the topic sentences D. the positions of the introductions The purpose a writer gives to a work is often referred to as ________. I need the answer to 3/41/5 who want be my friend but first help me with this Caused a statement where neither the Allied nor the central powers could advancethere's a machine gun, tank, trench warfare, u-boat, battleship chemical weapon, gas mask airplane Silvana has been practicing meditation for a few weeks, and during stressful times, she's been observing her thoughts rather than allowing them to consume her attention. What is this behavior called Can you please help with this problem Industrial agriculture ________. A) has had no impact on society B) was replaced by more modern farming practices during the Green Revolution C) has increased our ability to obtain more food from the same area D) has permanently improved soils, providing more food from less space E) has rapidly deteriorated soils, requiring continuous conversion of new areas to cropland 1. How were the European leaders' views different than Wilson's views? WHY? Describe the tenant life being depicted in this photograph.Why have the tenants chosen to remain outside of the home In statistics, when a set of values is sorted in ascending or descending order, its median is the middle value. If the set contains an even number of values, the median is the mean, or average, of the two middle values. Write a function that accepts as arguments the following:a. An array of integersb. An integer that indicates the number of elements in the arrayThe function should determine the median of the array. This value should be returned as a double. 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