1) A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with a
velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is the
constant force exerted on the ball by the wall?

Answers

Answer 1

Answer:

Force = -10 Newton.

Explanation:

Given the following data;

Initial velocity = 8.5m/s

Final velocity = 7.5m/s

Time = 0.25 seconds

Mass = 2.5kg

To find the force exerted;

First of all, we would determine the acceleration of the ball;

Acceleration = (v - u)/t

Acceleration =(7.5 - 8.5)/0.25

Acceleration = -1/0.25

Acceleration = -4 m/s²

Now, to find the force exerted;

Force = mass * acceleration

Force = 2.5 * -4

Force = -10 Newton

Note: The force is negative because it is an opposite reaction.


Related Questions

What happens when a pebble lying on the ground is kicked?

A. Energy is completely lost.

B. Energy is created.

C. Energy is destroyed.

D. Energy is transferred.

Answers

Answer:

I'm 100% sure it's D. but if it isn't, sorry :(

D. Energy is transferred
explanation: energy is neither created nor destroyed, energy can be transferred from one object to another

Which type of waves are able to travel through various types of media and space
a) body
b) electromagnetic
c) parabolic

Answers

Answer:

B

Explanation:

......................

Niceeeeeeeeeeeeeeeeeeeeeeeeee

A sodium vapor lamp omit waves with the frequency of 5.26x10^14 Hz. What is the wavelength of light?

Answers

Answer:

[tex]\lambda=5.70\times 10^{-7}\ m[/tex]

Explanation:

The frequency of a sodium vapor lamp, [tex]f=5.26\times 10^{14}\ Hz[/tex]

We need to find the wavelength of light. The relation between wavelength, frequency and speed of light is given by :

[tex]c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{5.26\times 10^{14}}\\\\\lambda=5.70\times 10^{-7}\ m[/tex]

So, the wavelength of light is equal to [tex]5.70\times 10^{-7}\ m[/tex].

14
A measure of the gravitational force exerted on an object?

A Weight
B) Force
C)Air resistance

Answers

Answer:

C

Explanation:

Answer:

A) weight

Explanation:

Hope it helps :))

Choose the correct words from the box to complete the definition of resistance.
current difficulty ease potential difference
The electrical resistance of a material is a measure of the ______________ of passing a ______________ through it.

Answers

Answer:

Opposition of passing a electric circuit

A drone flies upward with a velocity of 5m/s and has a kinetic energy of 90J What is the mass of the drone?
O 5.4 kg
1.9 kg
7.2 kg
3.6 kg

Answers

Answer:

m = 7.2 kg

Explanation:

Given that,

The velocity of the drone, v = 5 m/s

The kinetic energy of the drone, E = 90 J

We need to find the mass of the drone. The formula for the kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2\\\\m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 90}{(5)^2}\\\\m=7.2\ kg[/tex]

So, the mass of the drone is 7.2 kg.

how are work and power shown when you are driving a car?

Answers

When driving a car, as you very well know, the engine is working, by enabling the car to move, and helping the tires roll. Power is used by enabling the car to turn on, the engine helps again.

Sound travels Faster through _____________ mediums.

A) Denser
B) Less Dense
C) Colder
D) Sound always travels at the same period

Answers

Answer:

I know for sure that it's either A or B have a great day sorry I don't know which one completely

i think it’s A sounds travels faster through Denser mediums

What is the mass of a large ship that has a momentum of 1.60x10^9 kg*m/s and is moving at a velocity of 10m/s?

Answers

Answer:

160000000 kg.

Explanation:

p=mv

p=1.6x10^9

v=10m/s

rearrange and substitute:

(1.6x10^9)=m(10)

m=(1.6x10^9)/10

m= 1.6x10^8 kg.

Tom puts a metallic cover over his car's windshield after parking. How does this control
the sun's rays during a sunny day?

Answers

The metallic cover deflects the suns rays

The process of sediments being compacted and cemented to form sedimentary rocks is called

Answers

Answer:

Lithification is the answer.

PLEASE HELP ASAP!!!

Answers

Answer:

WRITE A ONE PAGE ESSAY TO EXPLAIN THE AUTHOR'S PURPOSE IN WRITING HOM SMART ARE ANIMAL

Explanation:

Essay to write write it

Someone who strength trains twice a week can reduce their muscle loss percentage from % to % every decade.​

Answers

what? i’m very confused?

Height of tallest wave possible

Answers

An earthquake followed by a landslide in 1958 in Alaska's Lituya Bay generated a wave 100 feet high, the tallest tsunami ever documented. When the wave ran ashore, it snapped trees 1,700 feet upslope. Five deaths were recorded, but property damage was minimal because there were few cities or towns nearby.

Gravitational potential energy (1) - masss (kg) x gravitational field strength (N/kg) x height (m)
1. Calculate the gravitational potential energy of the following masses on top of Trump tower which has a mass
of 202 m (g= 9.81 N/kg)
a) 100 kg
b) 90 kg
c) 45 kg
d) 58 kg
e) 1g
1) 1000 g
h) 1998
1) 1.5 kg
g) 100 g

Answers

[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Potential Energy.

Here lets calculate it one by one ;-

1.) P = mgh ==> 100*9.81*202===> 198162 Joules

2.) P = mgh ==> 90*9.81*202 ==> 178345.8 Joules

3.) P = mgh ===> 45*9.81*202 ===> 89172.9 Joules

4.) P = mgh ===> 58*9.81*202 ===> 114933.96 Joules

5.) P = mgh ===> 0.001*9.81*202 ===> 1.981 Joules

6.) P = mgh ===> 1.00*9.81*202 ===> 1981.62 Joules

7.) P = mgh ===> 1.998*9.81*202 ==> 3959.27 Joules

8.) P = mgh ===> 1.5*9.81*202 ===> 2971.43 Joules

9.) P = mgh ===> 0.1*9.81*202 ===> 198.162 Joules.

Above we calculated the potential energy for every mass given above.

Radon-220 is a radioactive gas. It escapes from underground rocks and causes a large part of the natural background radiation in the United Kingdom. It has an atomic number of 86. How many neutrons are there in its nucleus?

Answers

Answer: 134 neutrons are there in the nucleus of Radon-220

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Thus, number of protons = atomic number = 86

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

220 = 86 + Number of neutrons

Number of neutrons = 134


Please help


What differentiates one layer of the atmosphere from one another?



Please help

Answers

Answer: The stratosphere and the troposphere are defined by the variation in temperature with height. Within a troposphere, the temperature drops as altitude increases, and drops fast enough for convection to occur. Whereas within a stratosphere, the temperature rises with increasing altitude. Features of the atmosphere change with altitude: density decreases, air pressure decreases, temperature changes vary. Different temperature gradients create different layers within the atmosphere. The lowest layer is the troposphere where most of the atmospheric gases and all of the planet's weather are located.

Explanation:

Which of the following accurately describes how scientists use models?
A. To make science seem more complex and inaccessible
B. To take measurements of an object, process, or system as it is in
nature
C. To make direct observations of a natural object, process, or
system
D. To represent objects, processes, and systems that are too large,
too small, or too complex to study directly

Answers

Answer:

D

Explanation:

To represent objects, processes, and systems that are too large, too small, or too complex to study directly

The correct option is (d) To represent objects, processes, and systems that are too large, too small, or too complex to study directly.

Scientists employ models to comprehend phenomena they are unable to directly observe. Models aid scientists in their understanding of phenomena, no matter how big or little they may be, such as the universe or an atom. Additionally, they can aid in their understanding of systems like weather patterns.In a range of scientific disciplines, from physics and chemistry to ecology and the Earth sciences, scientific models are employed to explain and forecast the behavior of real things or systems.Models can aid in scientific prediction, understanding of processes, and communication of ideas.

The 4 types of scientific models -

Analogies diagrams, Physical replicas, Mathematical representations.Simulations on a computer.

Learn more about scientific models brainly.com/question/14250312

#SPJ2

Please help, it’s the last question and I’m bad at Physics

Answers

Answer:

The end velocity of the sculpture is 7.00 m/s²

Explanation

The equation needed here is v = √(2gh).  Let's do it:

v = √(2 × 9.8m/s² × 2.5m)

v = √(49.0 m²/s²)

v = 7.0m/s

Funny enough the numbers given don't have the accuracy demanded.  We're given is 2.5m which is only accurate to the tenths, and 30kg which is only accurate to the nearest integer.  Also, presumably the acceleration due to Earth gravity that's provided is only 9.8m/s², so that's still only the nearest tenth.  So taking those and asking to find the answer to the nearest hundredth is pointless.

But whatever.  The given answer is correct to the nearest hundredth.  7.00m/s²  To be sure, I plugged it into a form on a physics page that does exactly that, and the answer they gave was 7.0023745972349, so we have it rounded correctly.

How fast is a skydiver going after 5 seconds or free fall and how far did he fall

Answers

Answer:

It's typically around 120mph. You'll reach this speed a few seconds into your jump, so for those few moments straight out the door, you'll be falling a bit more slowly and therefore covering less distance. We usually estimate around 10 seconds for the first 1,000 feet, then 5 seconds for each 1,000 feet after that.

Explanation:

1. Using pollen grains placed in water,
explain how their motion supports the
idea that matter is not continuous.​

Answers

hope it helps!!!!!!!!!!!!!!!

Which of these is not a standard unit?
a. second
b. metre
c. hand span
d. gram

Answers

Answer:  Hand span

Explanation: Hand span is not a standard unit.

Second is the unit of time.

Meter is the unit of length or distance covered by an object.

Gram is the unit of weight of an object.

Hand span is not a standard unit. This is because the size of hand varies from person to person. Hence, the correct option is (c) "hand span".

Hand span is not a standard unit

What is the limiting factor of speed for an object falling through a vacuum?

Answers

★☆〖Qบęຮτ ı¨ ø nˇ〗☆★

Air Resistance is the factor, which limits the speed of an object falling through the air...⭐

____________________________________________________

<Judge It Yourself...>

Hope it helps you! ヅ

✪ Be Brainly ✪

how are electromagnetic waves produced

Answers

Answer:

Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave.

Answer: Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges.

The creation of all electromagnetic waves begins with a charged particle. This charged particle creates an electric field (which can exert a force on other nearby charged particles). When it accelerates as part of an oscillatory motion, the charged particle creates ripples, or oscillations, in its electric field, and also produces a magnetic field (as predicted by Maxwell’s equations).

Once in motion, the electric and magnetic fields created by a charged particle are self-perpetuating—time-dependent changes in one field (electric or magnetic) produce the other. Both electric and magnetic fields in an electromagnetic wave will fluctuate in time, one causing the other to change.

Electromagnetic waves (photons) are produced anytime a charged particle experiences a change in velocity.. The electromagnetic wave (radiation) that is produced when the charge particle changes it’s velocity is how energy is conserved. This energy is light.

Hope this helps have a awesome day/night❤️✨

Explanation:

The gravitational force between two objects in space is 800 million
newtons. If the distance between them is doubled, what size will the
gravitational force be (in millions of newtons)?

Answers

Answer:mass and weight Explanation:The Moon is smaller and has less mass than the Earth, so its gravitational field strength is only about one-sixth of the Earth's. So, for example, a 120 kg astronaut weighs 1200 N on Earth but only 200 N on the Moon.

DUE TONIGHT, JUST NEED TO CONFIRM ANSWER
3. An object moves in uniform circular motion with a centripetal force of 4.5 N. Which of the following is true?

(A) The object’s velocity vector is constant in magnitude and direction.

(B) The object’s acceleration vector is constant in magnitude and direction.

(C) Both the object’s velocity and acceleration vectors change both their magnitudes and directions.

(D) Both the object’s velocity and acceleration vectors have constant magnitudes but change directions.

Answers

Answer:

the answer is D I THINK

Explanation:

How many seconds will it take for a the International Space Station to travel 450 km at a rate of 100 m/s?

Answers

Time = (distance) / (speed)

Time = (450 km) / (100 m/s)

Time = (450,000 m) / (100 m/s)

Time = 4500 seconds (that's 75 minutes)

Note:

This is about HALF the speed of the passenger jet you fly in when you go to visit Grandma for Christmas.

If the International Space Station flew at this speed, it would immediately go ker-PLUNK into the ocean.

The speed of the International Space Station in its orbit is more like 3,100 m/s, not 100 m/s.

newtons = mass x _______
a) capacitance
b) inductance
c) gravitational field strength

Answers

Answer:

c) gravitational field strength

Hope it helps

Please mark me as the brainliest

Thank you

How do you find your target heart rate for a female

Answers

subtract your age from 220

Whether or not the information on an online source is credible and factual, is up to the user to decide.

Answers

Answer:

Informational references provide only a limited amount of specific statistical information. false. Information should be________to ensure more than one source provides the same factual information.

Explanation:

Answer:

The statement presented above is TRUE. Yes, it's up to us whether to accept the statement whether as reliable or not. At the end of the day, it is our responsibility to know the facts and not let other people dictate what you have to think about. It has to be taken into account that you can decide for yourself.

Explanation:

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