A car of mass 10.0 ks traveling at 5.00 m/s comes to rest due to friction after traveling 20.0 m. What is the work done on the car by the friction?

A. –125 J

B. –50 J

C. 50 J

D. 125 J

Answers

Answer 1

 The work done on the car due to friction is -125 J.

What is workdone?

Work is said to be done when a force moves an object through a certain distance.

To calculate the workdone on the car by friction, we use the formula below

Formula:

W = m(v²-u²)/2.......... Equation 1

 

Where:

W = Work done due to fricionm = mass of the carv = Final velocityu = Initial velocity

From the question,

Given:

m = 10 kgv = 0 m/su = 5 m/s

Substitute these values into equation 1

W = 10(0²-5²)/2W = 5(-25)W = -125 J

Hence, The work done on the car due to friction is -125 J.

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Related Questions

Which is a situation where two hockey pucks could have equal but opposite momentums? Assume that the ice is a frictionless surface.

A. if the hockey pucks weigh the same.

B. if the hockey pucks exert the same force on each other in the same direction while traveling at the same speed.

C. if the hockey pucks are traveling at the same speed, bounce off each other, and move in the opposite direction.

D. if the hockey pucks have the same mass.

Answers

As momentum is mass * velocity,
it has to be C, assuming their masses are the same. As the momentum would be equally distributed as momentum must be conserved( because none is lost to friction on the ice).

Do people actually see me inverted?☹​

Answers

Answer:

of course is clear

Explanation:

very clear

Magnetism is due to the movement of ______.

Answers

Answer:

electrons

Explanation:

Brainliest

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

Magnetism is due to the movement of charge

Both magnetic fields are caused due to attraction and repulsion of charges, where electric fields is caused by stationary charges, while magnetic fields are caused by moving charges

An inductor produces a back emf in a dc series rl circuit when a switch connecting the battery to the circuit is closed. We can explain this by.

Answers

Hi there!

Let's say that a series RL circuit is constructed, with the switch left open.

When the switch is closed, a current will start flowing in the circuit. The INCREASING current will go through the loops of the inductor, producing an INCREASING magnetic field and consequentially a magnetic flux through the inductor. (Use hand rules).

However, the inductor does NOT want to experience this increasing magnetic flux, so an emf in the OPPOSITE direction of the current will be produced to counteract the increasing flux. (The flux would also be in the opposite direction).

This is expressed with the equation:


[tex]\epsilon = -L \frac{di}{dt}[/tex]

ε = Back emf (V)
L = Inductance (H)

i = Current (A)
t = time (s)

With the negative sign, we can see that if the current of the circuit is INCREASING, the emf produced would be in the opposite direction.

The worker in the picture is
a.) letting the pulley do all the work
b.) not doing work because he is using a pulley
c.) doing work because he is moving the bale of cotton
d.) transforming mechanical energy to potential energy

Answers

Answer:

the worker is doing work because he is moving the bale of cotton

A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the slit width increases, the diffraction pattern:.

Answers

As the slit width increases, the diffraction pattern gets narrower and vice versa.

Relationship between width and diffraction pattern

The increase in silt width leads to the narrowing of diffraction pattern of the  light because the increase of width reduces the space for the passing of light wave.

So we can conclude that as the slit width increases, the diffraction pattern gets narrower and vice versa.

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What is simple harmonic oscillation? express your answer verbally, mathematically, and visually.

Answers

Simple harmonic motion is the motion in objects where the restoring for d is directly proportional to the body displacement.

What is simple harmonic motion?

Simple harmonic motion a type of periodic motion where the force that restores moving object to it's right position is directly proportional to the magnitude of body's displacement and this normally acts towards the object's equilibrium position.

The formulate for simple harmonic motion are

,F = −kx, where F is the force, x is the displacement, and k is a constanst. An example of a simple harmonic oscillator is the vibration of a mass attached to a vertical spring.

Simple harmonic oscillator can be represented by the equation x ( t ) = A cos ⁡ ( 2 π f t ) x(t) = A\cos(2\pi f t) x(t)=Acos(2πft)x,

where t is period.

x is displacement

A is amplitude.

Learn more about simple harmonic motion here.

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I. Briefly answer the following questions.
1. Do renewable energy sources have little or no impact compared to
non- renewable resources? Why?

2. Discuss two human activities that endanger renewable resources.​

Answers

Most sources of renewable energy result in little to no emissions, even when considering the full life cycle of the technologies. Renewable energy emits no or low air pollutants.Because renewable energies are not burned like fossil fuels, they do not release pollutants into the atmosphere and provide a cleaner, healthier environment. Sources of renewable energy are found everywhere in the world and cannot be depletedSome human activities that endanger renewable resources are the hunting and fishing of animals for food, and the clearing of forests for urbanization and wood use.

For pea plants, T represents a dominant allele for tall pea plants and t is the recessive allele for short pea plants. If two plants with the Tt genotype are crossed, what is the probability that offspring will exhibit the dominant trait?

Answers

Answer:

75%(TT,Tt,tt) Hope that helps

A force of 20 N is applied tangentially to a wheel of mass 10 kg and diameter 5 m. Calculate the torque applied and angular velocity at the end of 10 second?​

Answers

Answer:

N = 20

10 + 10 + -5 = 20

N + -5 = 10 -5 + 20

Therefore , the answer is N=20

Explanation:

#BrainliestBunch

Please help me with the blanks

Answers

Answer:

wavelength and frequency

Explanation:

wavelength is the distance between waves while frequency is the number of times in which the wave occurs.

Please Answer this question

Answers

Answer:

T = 14.7 N

Explanation:

When released the two blocks will accelerate

See diagram below  (hope it is not too confusing or unclear)

(b) Fig. 7. 2 shows a metal sphere on an insulating support.

C

Fig. 7. 2

A student has available two rods, one charged positively and one charged negatively. Using

one of these rods, she gives the sphere a uniform negative charge by induction

State which rod she chooses, and describe the procedure she follows.

Answers

The rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.

Charging by induction

Charging an object by induction is a process of inducing a charge on the object by bringing another charged object close to it.

Charge on the sphere

When a positively charged rod is brought near a neutral sphere (equal negative and positive charge),  the positive charge of the rod will repel the positive charge of the sphere, leaving the sphere with excess negative charge.

Thus, the rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.

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There are ___ particles that make up an atom which are the smallest unit of an ___.

Answers

Answer:

subatomic, element

Explanation:

Subatomic particles are protons, neutrons, and electrons. Atoms are the smallest unit of an element.

What will happen to the period of a ball-on-a-spring if the ball is replaced by a smaller one with half the mass

Answers

When the ball on a spring is replaced by a smaller ball with half the mass :  The period decrease by 29%

Calculate the Period

We will apply the formula below to calculate period

T = [tex]2\pi \sqrt{\frac{m}{k } }[/tex]

 where :

T₁ / T₂ = [tex]\sqrt{\frac{m_{1} }{m_{2} } }[/tex]    where m₂ = m₁ / 2

Therefore :

T₂ = [tex]\frac{T_{1} }{\sqrt{2} }[/tex]   = 0.71 T

Hence we can conclude that the period will decrease by 29% ( i.e 100 - 71 ).

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You are taking measurements of sound waves. Every ¼ second, the sound waves pass your detector. What is the wave’s frequency and what is the wave’s period? (Use correct units)

Answers

Answer:

hope this helps, you can ask any questions for clarification

Question 4

20 pts

A student connects a length of unknown

material in series with a battery and an

ammeter (which measures current flow).

When the circuit is complete, the ammeter

reads that no current is flowing.

The unknown material is most likely –

Insulator

Semiconductor

Superconductor

Conductor

Answers

If current did not flow in the circuit, it simply implies that the material is an insulator.

What is an insulator?

An insulator is a material that does not conduct electricity. A circuit is a  path  that is provided for the flow of current.

If this material was connected into a complete circuit yet current did not flow in the circuit, it simply implies that the material is an insulator.

Learn more about insulator: https://brainly.com/question/12980705

Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature are their readings numerically the same

Answers

Answer:

To change degrees Celsius in degrees Fahrenheit, the formula is:

F = 1.8C +32F=1.8C+3

Explanation:

C = 1.8C +32C=1.8C+32

C = -40C=−40

T=-40+273.15=233.15\ KT=−40+273.15=233.15 K

describe the ways that people are trying to use technology to protect the environment and increase sustainability.

WILL NAME BRAINLIEST please help

Answers

Answer:

One way people are using technology to protect the environment is:

Using digital devices for communicating and storing information means that there is less reliance on paper, which reduces deforestation. Since trees are an important source of oxygen and also absorb carbon dioxide, this further reduces climate change.

Environmental technology has enabled us to capture this naturally occurring energy and convert it into electricity or useful heat through devices such as solar panels, wind, and water turbines.



Explanation:

Have a great of your day
#TheWizzer

15 points!! PLEASE ANSWER! I NEED IT QUICK!
What happens to the energy of a wave if the amplitude of the wave is doubled?

How does the frequency of a wave relate to the energy of the wave?

Answers

Answer:

See below ↓

Explanation:

We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.

Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.

Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.

E ∝ ν

How do you boost the amount of electricity a fuel cell system produces?.

Answers

For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.

The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

What is battery?

A battery is a device that uses an electrochemical oxidation-reduction (redox) cycle to turn the chemical energy included in its active components directly into electric energy. An electric circuit is used in this kind of reaction to transmit electrons from one substance to another.

The actual elector-chemical unit used to produce or store electric

For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.

The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

To learn more about battery refer to the link:

brainly.com/question/19225854

#SPJ2

Which condition is necessary for a lunar eclipse to occur?.

Answers

For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes

Superkid, finally fed up with Superbully's obnoxious behaviour, hurls a 1.35 kg stone at him at 0.501 of the speed of light. How much kinetic energy do Superkid's super arm muscles give the stone

Answers

Answer:

See below

Explanation:

A lot !

KE = 1/2 m v^2

    = 1/2 * 1.35 * ( .501 * 3 * 10^8)^2 =

    1.5248 x 10^16 j

kinetic energy do Superkid's super arm muscles give the stone is 62.6 × 10⁶ J.

What is kinetic energy ?

Kinetic energy is the energy associated with a motion of a body. When a body is in motion having mass m then it has kinetic energy. Kinetic energy is denoted by K or T. it is expressed in joules. Kinetic energy is given by,

K = 1/2 mv²

Hence an object having zero mass or zero velocity have zero kinetic energy.

In this problem the stone is moving with velocity which is comparable with the speed of light, hence we have to find relativistic kinetic energy.

The relativistic kinetic energy is given by,

[tex]K = m_{0} c^2(\frac{1}{\sqrt{1-\frac{v^2}{c^2}} } -1)[/tex]

putting all the values in the equation

[tex]K = 1.35*3*10^8(\frac{1}{\sqrt{1-\frac{(0.5c)^2}{c^2} } }-1 )[/tex]

K = 62.6 × 10⁶ J

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#SPJ2.

Copper (II) chloride reacts with magnesium nitride

Answers

Answer:

I don't know

Explanation:

because I'm not smart

7. A rocket has a weight of 30,000 N on earth. a) What is the mass of the rocket in outer space? Use appropriate calculations and arguments to support your answer.
b) Calculate the weight of the rocket on planet X (g=7.5 N/Kg)
c) What is the weight of the rocket in outer space? Provide reasons to support your answer

Answers

Explanation:

a) mass=3000kg

b) weight on planet x=3000 × 7.5

=22,500N

c) Weight in outer space will be equal to zero

since the gravity in outer space is negligible

A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 388 K. If 80 J of work is done by the gas during this process, what is the mass of the helium sample? The universal gas constant is 8.31451 J/mol · K. Answer in units of g

Answers

The mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.

Number of moles of the helium gas

The number of moles of the helium gas is calculated as follows;

W = nRT

where;

n is the number of molesW is the work doneR is universal gas constant = 8.31451 J/mol · KT is the final temperature = 388 K

273 K = 0⁰C and 388 K = 115⁰ C

from 0⁰C to 115⁰C = 115 - 0 = 115⁰ C

115⁰ C = 388 K

The number of moles is calculated as follows;

n = W/RT

[tex]n = \frac{80}{8.315 \times 388} \\\\n = 0.0248 \ mol[/tex].

Mass of the helium sample

Mass of the helium sample is calculated as follows;

m = Mn

where;

M is the molar mass of helium gas = 4 g/mol

m = 4 g/mol x 0.0248 mol

m = 0.099 g

Thus, the mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.

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How much work do you do on a 25- kg backpack when you walk a horizontal distance of 100m ?

Answers

Answer:

2,500

Explanation:

An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will:.

Answers

Answer:

Move the opposite direction ( at a lesser magnitude of velocity)

Explanation:

A step-up transformer increases the voltage 20 timesIf the voltage of the primary coil is 100V_{i} what is the voltage of the secondary coll? Answer only a number without units or commas

Answers

Answer:

2000

Explanation:

well it is just   20 * 100 = 2000 v

please answer this small qustion of what happens whan oil is in the ochen

Answers

Answer:

When oil is spilled in the sea it will normally break up and be dissipated or scattered into the marine environment over time. This dissipation is a result of a number of chemical and physical processes that change the compounds that make up oil when it is spilled. The processes are collectively known as weathering.

Hope This It What You Wanted :)

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