What is the Kinetic Energy of a 120 kg object that is moving with a velocity of 15 m/s

Answers

Answer 1

Answer:

Kinetic Energy:120 x 15=1800

Explanation:

Answer 2

Answer:

13500J

Explanation:

Kinetic energy = (1/2×120)kg × (15m/s)^2

KE = 60kg × 225 (m/s)^2 = 13500J


Related Questions

What is the blank? (physics)
The total energy of a system is equal to the energy added to the system plus the work and the ____ that is produced.

Answers

Answer:

Heat???

Sorry I am not at all sure

Between steel and iron which is more suitable for making permanent magnets electromagnet and magnetic screen ​give reason for your answer

Answers

Answer:

steel is suitable for making permanent magnet

as still has hi factor coercity.

iron is for electromagnet and magnetic screen as iron loses its magnetism as soon as the switch is open and a current is switched off.

Steel is better suitable for making permanent magnets than soft iron since it has higher retentivity and lower coercivity. Compared to soft iron, steel has a lower retentivity and higher coercivity. Compared to soft iron, steel is more resilient and coercive.

What is retentivity and coercivity ?Retentivity : The ability to retain the generated magnetization in a magnetic material when the magnetizing force is removedCoercivity : A measure of the ability of a material to withstand an external magnetic field without becoming demagnetized.What is Permanent magnet and Electromagnet?

Permanent magnet : To be suitable for permanent magnet, material should retain its magnetism for longer time, since  steel have high retentivity and coercivity . Electromagnet : To be suitable for electromagnet , material should have magnetization and demagnetizing property .

Since , steels have high remanence which means it will remain magnetized even after magnetic field is removed which is not suitable for electromagnetic . iron has high permeability so magnetization is larger and have low retentivity so that material will not retain the magnetic properties . Magnetic screen ​, Iron has high permeability hence it can shield better than steel

To learn more about retentivity and coercivity

https://brainly.com/question/24130879

#SPJ2

What happens when an object becomes cold?
Energy is added to it.
Mass is removed from it.
Cold is added to it.
Heat is removed from it.

Answers

Answer:

Heat is removed from it.

Explanation:

A object will become cold when it loses its heat to its surroundings. I would look up the 3 Principles of Heat Transfer.

I hope this helped! :)

What term is defined as speed with a specific direction?
velocity
position
distance
displacement

Answers

IT IS A : VELOCITY (Please give me brainliest)

Answer:

Velocity

Explanation:

I took the test.

How much voltage would it take to push 0.5 amps through a 2 kilowatt toaster?
1000 Volts
2000 Volts
3000 Volts
4000 Volts
5000 Volts
6000 Volts

Answers

Given :

Current, I = 0.5 A.

Power of toaster, P = 2 kW = 2000 W.

To Find :

How much voltage is required.

Solution :

We know, voltage is given by :

[tex]V = \dfrac{P}{I}\\\\V = \dfrac{2000\ W}{0.5 A}\\\\V = 4000 \ volts[/tex]

Therefore, 4000 Volts are required.

Answer:

4000

Explanation:

2000/0.5=4000

two homogeneous bodies of the same volume

Answers

Answer:

No, it is not necessary for them to have same mass.

Explanation:

Let both bodies have a density d1 and d2 respectively.

Since their volumes are equal V1 = V2

we know that, https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D

Hence, d1 =  and d2 =    

Taking the ratio of densities,we get

This implies that unless the bodies have same densities, the mass of the two bodies will not be same.

Why is it safer to collide with a soft cushion than a hard surface?

Answers

Answer:

Impulse is force multiplied by time; and together, the product must be 1 unit. A collision with soft ground will result in the 1 unit of impulse by a larger time and a smaller force (compared to the small time and a large force for the hard floor).

A spring with a spring constant of 40 N/m is compressed 0.15 m. How much energy is stored in the spring?

Answers

Answer: Energy is conserved.

Explanation: Energy stored in spring = Potential energy gained by object at maximum height

Eiman connects eight 12Ω lamps in series. What is
the total resistance of the circuit?

Answers

Answer:

Total resistance = 96 Ohms

Explanation:

Given the following data;

Resistance = 12 Ohms

Number of resistors = 8

To find the total resistance;

Method I.

Since the resistors are connected in series, we would simply multiply the resistance by the number of resistors.

Total resistance = 12 * 8

Total resistance = 96 Ohms.

Method II.

We would add the resistance of all the eight resistors together.

Total resistance = 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12

Total resistance = 96 Ohms.

The total resistance of the circuit will be "96 Ω".

Resistance and Current:

Resistance: The amount of resistance to current flow throughout an electrical circuit.

Current: The movement of electrical charge carriers such as electrons has been referred to as current. The flow of current seems to be from negative (-) to positively (+) locations.

According to the question,

Resistance = 12 Ω

No. of resistor = 8

The total resistance be:

= [tex]Resistance\times Number \ of \ resistors[/tex]

By substituting the values,

= [tex]12\times 8[/tex]

= [tex]96 \ \Omega[/tex]

Thus the above answer is right.

Find out more information about resistance here:

https://brainly.com/question/24858512

How to calculate the refraction of light from air to water​

Answers

Answer:

hope it would be helpful

2. a) A student obtained ice at 0°C from a refrigerator and placed it in a beaker on a
bench. After 4 minutes, the temperature rose to 4°C. State the changes that would be observed in the water in terms of;
(i) volume
(ii) mass
(iii) density

(b) Sketch a graph of density against temperature if the ice is warmed from 0°C to
8°C.

Answers

Answer:

2 4

Explanation:

because

If an object has a velocity of 15 m/s and a momentum of 30 kg m/s, what is its mass?

Answers

Answer:

30kgm/s/15m/s=2kg

Explanation:mass=momentum/velocity

The  mass of the object is 2 kg.

What is momentum?

The product of a particle's mass and velocity is its momentum. Momentum is a vector quantity, meaning it has both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of change of momentum.

Given that:

Velocity of the object: v = 15 m/s.

Momentum of the object: p = 30 kg m/s.

Let the mass of the object = m.

From the definition of momentum; we get:

momentum = mass × velocity

30 = 15 m

m = 2 kg.

Hence, mass of it is 2 kg.

Learn more about momentum here:

https://brainly.com/question/24030570

#SPJ2

Which type of energy can be sensed by the eyes?
OA. electrical energy
B.
sound energy
OC. thermal energy
D. light energy

Answers

Answer:

light energy..

........

Answer:

light energy

Explanation: that is the only type of energy you can actually see.

which event involves throwing a spherical weight from the shoulder?
a. discus throw
b. hammer throw
c. shot put​

Answers

Answer:

c. shot put

Explanation:

cause the shot is a ball

Shot put!!!!! C:shot put

which natural disaster comes from powerful thunderstorms that originate over land
a hurricane
b cyclone
c tornado
d typhoon​

Answers

The correct answer is typhoon.

Hope this helps!

Answer:

Typhoons form over landmasses, typically after a period of very warm weather. Desert areas are known to have flash floods. Flash floods are normally widespread over large areas, rising and dissipating slowly. Violent, whirling wind that moves in a narrow path over land, forming a highly destructive funnel is called a .

Explanation:

I hope this helps and pls mark me brainliest :)

an object that is accelerating may be

Answers

It must be either speeding up, or slowing down, or turning. There are no other possibilities.

001)
9. A ball is rolled at a velocity of 12 m/s. After 36 seconds, it comes to a stop. What is the acceleration of the ball?

Answers

Answer:

0.33333333333

Explanation:

a = v/t

= 12/36

= 1/3

= 0.3333

Answer:

3

Explain

36/12


The brakes of a lorry are in a poor condition
What effect will the condition of the brakes have on thinking distance and the braking
distance of the lorry?

Answers

Answer:

friction

Explanation:

Her brakes will squeak and possibly slide or skid on concrete due to her brakes.

BUT it really depends on the condition of the wheels. Now it matters on the surface as well. Has the road been eroded? what has happened with her brakes? and what texture are the wheels? can seismic waves travel through them?

Answer:

thinking distance stays the same and the braking distance increases

AQA Approved.✅

Explanation:

Need help as fast as possible please
I will mark BRAINLIST only for correct answers babes :)
Thank you!

Answers

Regular reflections occurs when light reflects off a very smooth surface and forms a clear image.
Diffuse reflection: occurs when light reflects off a rough surface and forms a blurry image or no image at all.

Similarities: they both hit the surface, but the difference is one of them give clear image the other one gives blurry image or no image at all.

Hope this helped!

The acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the
ball. This example best illustrates what law?

A.Newton's first law of motion

B.Newton's second law of motion

C.Newton's third law of motion

D.Newton's law of universal gravitation

Answers

Answer:

B. Newton's second law of motion

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

[tex] Net \; Force = mass * acceleration [/tex]

Making acceleration the subject of formula, we have;

[tex] Acceleration = \frac {Net \; Force}{Mass} [/tex]

In this scenario, the acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. Thus, this example best illustrates Newton's second law of motion.

Work out the current through a television with a power of 0.8 kW if it uses the 230 V mains supply. Give your answer to 1 decimal place.

Answers

Answer:

the current is 3.5 A

Explanation:

The computation of the current is shown below:

As we know that

Current [A] = Electrical power [W] ÷ Potential difference [V]

Now convert KW TO W = × 1000

So, the current is

= 800W ÷ 230V

= 3.5 A

Hence, the current is 3.5 A

*Urgent*


(Part 1)


A merry-go-round rotates at the rate of 0.4 rev/s with an 99 kg man standing at a point 2.5 m from the axis of rotation. What is the new angular speed when the man walks to a point 1 m from the center? Consider the merry-go-round is a solid 73 kg cylinder of radius of 2.5 m. Answer in units of rad/s.


(Part 2)


What is the change in kinetic energy due to this movement? Answer in units of J.

Answers

Answer:

6.5 rad/s

11.695 kJ

Explanation:

Using the principle of conservation of momentum, we have

L1 = L2 and

I1w1 = I2w2, with I being the moment of inertia and w being the angular velocity.

w1 = 0.4 rev/s = 0.4 * 2π = 2.51 rad/s

Moment of Inertia, I = ½MR² + mr²

I1 = ½ * 73 * 2.5² +99 * 2.5²

I1 = 73 * 3.125 + 99 * 6.25

I1 = 228.125 + 618.75

I1 = 846.875 kgm²

The man has been said to have walked 1 m away from his position, so then

I2 = ½ * 73 * 2.5² + 99 * 1²

I2 = 228.125 + 99

I2 = 327.125 kgm²

From the formula stated above,

w2 = I1w1 / I2

w2 = (846.875 * 2.51) / 327.125

w2 = 2125.65725 / 327.125 rad/s

w2 = 6.5 rad/s

2

K = Iw²

K = 846.875 * 2.51²

K = 2125.65725 J

K'= Iw²

K' = 327.125 * 6.5²

K' = 13821.03125 J

Change in energy is given as, K' - K, so that

Energy, E = 13821.03125 - 2125.65725

Energy, E = 11.695 kJ

Why is an electromagnet used instead of a permanent magnet in magnetic cranes?​

Answers

Answer:

an electromagnet is a metal which has the ability to turn into a magnet on passing electricity through it .

But once the electric flow is withdrawn the circuit breaks and it no more behaves like a magnet.

but this is not so in permanent magnets

Explanation:

thus electromagnet is used in magnetic cranes bcoz their magnetism can be controlled conveniently.

According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other.

Many stars have planets around them. If there were no gravity attracting a planet to its star, the planet's motion would carry it away from the star. However, when this motion is balanced by the gravitational attraction to the star, the planet orbits the star.

Two solar systems each have a planet the same distance from the star. The planets have the same mass, but Planet A orbits a more massive star than Planet B.


Which of the following statements is true about the planets?
A.
Planet B is more attracted to its star than Planet A.
B.
Planet B will keep orbiting its star longer than Planet A.
C.
Planet A orbits its star faster than Planet B.
D.
Planet A has a longer year than Planet B.

Answers

Answer:

C. Plant A orbits its star faster than Plant B

Explanation:

Did it on study island

If a machine exerts a force of 250N on an object and no work is done, what must have occurred?

Answers

The object did not move / was kept from moving.

which of these is NOT a metamorphic rock?

Basalt
Slate
Marble​

Answers

Explanation:

Basalt is not a metamorphic rocks

basalt is the answer

Are stairs a type of inclined plane?

Answers

Answer:

Inclined planes are simple machines used to make work easier. Ramps, ladders, and staircases are all inclined planes.

Explanation:

Answer:

imma say yes

Explanation:

value of x
Guys plz answer
and get marked as brainliest :)​

Answers

Answer:

80⁰

Explanation:

triangle AOB = 180

So, a = 50

triangle CAB = a+a+x=180

CAB = 50+50+X=180

CAB = X = 180-100

X=80

HOPE IT HELPS

Answer:

Explanation:

Since OA = OB (Radius of a circle)

angle OAB = angle OBA = 50

I'm not sure what to do beyond this...

I hope this piece of information was helpful.

Explain why background radiation is a mixture of contamination and irradiation

Answers

Answer:

People are exposed to sources of radiation in all aspects of everyday life. Radioactive sources can be very useful but need handling carefully to ensure safety.

Explanation:

pennies used to be called coppers. how do you suppose they got this nickname?

Answers

Answer:

because pennies are made from copper

Explanation:

Other Questions
(PLEASE answer ASAP, Will give brainliest)Coasting along at 7.8m/s, a 60.0kg bicyclist on a 7.00kg bicycle encounters a small hill. If the she coasts uphill until coming to a stop, how high up the hill did she travel? (b) What height would the bike reach if she had gone to the store and had 5.50kg of groceries before coasting up the hill? Please show your work. Which of the following describes the mRNA molecule produced from transcription?The mRNA molecule is made using the coding strand of DNA, which depends on the gene beingtranscribed.O The mRNA molecule is made using the coding strand of DNA and is transcribed in the paralleldirectionThe mRNA molecule is complementary to its DNA template, which depends on the gene beingtranscribed.O The mRNA molecule is identical to its DNA template, which depends on the gene being transcribed. What inverse operation should be used to isolate the variable in the equation k 9 = 10? What does it mean to be a Rigid Motion? Name 3 Rigid Motions that we discussed in Semester A: agree or desagree ? .......... Tell whether each proportion is true or false and prove your answer. Weight is best described asA) an objects resistance to acceleration.B) what causes an object to fall.C) the downward force exerted on objects due to gravity.D) a force solely dependent on an objects mass. we need a rock garden work a perimeter of 18ft area 18ft what is the length and width What are the depleted amounts of tangible assets and intangible assets known as?The annual depletion in the value of a tangible asset is known as (operating, amortization, or depreciation) expenses. The intangible assets also diminish in value, and this amount is known as (operating, amortization, or depreciation) expenses. Just look at the pictures I really need help Which graph represents 3x2 + 3y2 - 48x + 60y + 372 = 0? please help NO SPAM ! will mark brainiest ! BOTH ACTIVITIES PLEASE The solid has a mass of 180 g. What is the density of the solid? Show your work. Be sure to use correct units of measurement. HELP NEEDED ASAP!!!! HELP PLEASE!!Type the correct answer in the box. Spell all words correctly.Which part of an I-statement involves a description of your needs or feelings?The (blank) part of an I-statement involves a description of your needs or feelings. A rope weighs 800 grams per meter of length. What is the weight in kilograms of 12.2 meters of the rope? ayudaaa plis7-4= 6-2=-3-2=-8+9=-9+5=1+10= what is the name of earths internist layer Seventy-five percent of the apples pies were sold today. If 12 apples pie were sold, then how many pies were made today? Read the following passage and answer the questions. A recent sociological study looked at teenagers attitudes to marriage. The primary method used was questionnaires. Over 1000 teenagers answered questions on the subjects of marriage and their futures. Describe what is meant by a primary method. (2)Explain two advantages of using questionnaires for this research. (4)2. Discuss the strengths and weaknesses of observation as a method of research. (12) You should explore at least two strengths and two weaknesses in your response. Evaluate nzz22z when n=3. Simplify your answer.