When a car is going at a constant velocity down the freeway, is the net force zero or not zero assuming no friction?

Answers

Answer 1

Answer:

Zero

Explanation:

The net force acting on an object moving with constant velocity is zero. This is an accordance with the Newton's first law of motion.

Newton's first law of motion states that a body will continue in its state of rest or constant motion unless it is acted upon by an external force.

Since this body is moving with uniform motion, it is not accelerating. When a body is acceleration, the net force on it is not zero.

But this one is moving with uniform motion. The net force on the body is balanced and zero.


Related Questions

Where is the Long Head located?
Outside of the Arm
Inside of the Arm
On the Shoulder

Answers

Answer:

The biceps muscle is located at the front of your upper arm. The muscle has two tendons that attach it to the bones of the scapula bone of the shoulder and one tendon that attaches to the radius bone at the elbow. The tendons are tough strips of tissue that connect muscles to bones and allow us to move our limbs.

Explanation:

Glad i could help pls give brainliest and or thanks

A box is pushed horizontally with 30N for 3m. How much work was done?

Answers

90, since W=FxD so 30x3 is 90.

Quantitative data is _____________ Lesson 1.11
Question 9 options:

gathered by using measurement tools and math

measure color

measure smell o

bservations with our senses.

Answers

Answer:

gathered by using measurement tools and math

Explanation:

Quantitative data is often gathered by using measurement tools and math.

A quantitative data set is assigned values and numbers in order to solve a problem or for the purpose of a study.

Each data set has a unique numerical value and can be counted. Qualitative data set does not use numerals and numbers. It engages the senses to make some scientific deductions. Examples are measurement of volume, distance, length, time, number of moles e.t.c Qualitative data sets include taste, smell, color e.t.c

Answer:

a

Explanation:

The slope of a distance-versus-time graph shows an object's

A. speed.
B. time of travel.
C. distance traveled.
D. None of the other answer choices

Answers

the answer is A, speed.

can someone please help me

Answers

1. Mass
2. Speed
3. Kinetic energy

a bus accelerates from rest (zero speed) up to a speed of 32 m/s in 12 seconds. Calculate the acceleration.

Answers

Answer:

2.66666666666666666666666666 or 2 2/3

Explanation:

32/12 = 2 2/3 or 2.666666666666666666666666666666

Explain what was ultimately responsible for London’s “killer fog” in 1952.

Answers

Answer:

possible answer from edge

Explanation:

After World War II the only coal available to burn residentially, either for cooking or warmth, was of poor quality and contained large amounts of contaminants that made its fumes toxic. So when millions of homes in London burned this low quality coal and the local atmosphere over and around London stagnated, there was nowhere for the fumes to go. This stagnation allowed the toxic coal fumes to build up until they became physically harmful to humans and animals.

Burning of low quality coal was ultimately responsible for London’s “killer fog” in 1952.

What is Coal?

This is a type of sedimentary rock which is combustible and contain high amounts of carbon and hydrocarbon.

The low quality coal contained a lot of contaminants which was released into the atmosphere thereby creating the “killer fog” which adversely affected residents.

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difference between output work and input work​

Answers

An input device sends information to a computer system for processing, and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device.

Hope it helps!


The mass of a cannon ball is 10 kg. If the speed of the cannon ball is 50 m/s in
position A and E (just before hitting the ground), Calculate:

Answers

Answer:

Explanation:

Kinetic Energy = 0.5(Mass)(Velocity2)

Kinetic energy= 0.5 × 10kg × (50m/s)2

Kinetic Energy = 5kg × 2500m/s

Kinetic energy = 125000 J ( Ans)

Dr. Suarez walks 2.8 km north to get to an observation post, then walks 5.1 km south back to her outpost. Determine her distance.


A.) 2.3 km, north

B.) 7.9 km, south

C.) 7.9 km

D.) 2.3 km

Answers

Answer:

C.) 7.9 km

Explanation:

Distance and Displacement

An object who constantly travels for some distances at defined periods of time has a total distance as the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

Dr. Suarez walks 2.8 km north and then 5.1 km south. The total distance is simply the sum of both distances: 2.8 km + 5.1 km = 7.9 km.

Note the distance does not have any direction (north or south), it's just the number.

Answer: C.) 7.9 km

!!HELP HELP!!


Calculate how long it would take a car traveling at 30m/s to come to a complete stop if it has a constant deceleration of 4m/s²​

Answers

Answer:

7.5s

Explanation:

Given parameters:

Velocity  = 30m/s

Deceleration  = 4m/s²

Unknown:

Time it takes for the car to come to complete rest  = ?

Solution:

 To solve this problem, we use the kinematics expression below:

        v  = u + at

 Since this is a deceleration

         v  = u - at

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time taken

         v - u  = -at

         0  - 30  = -4 x t

              -30  = -4t

               t  = 7.5s

HELP PLEASE!!! 20 POINTS!!
In the formulas for latent heat of fusion and latent heat of vaporization, what does Q represent?
the amount of heat released or absorbed by a substance
the mass of a substance
the amount of a substance that changes state
the temperature of a substance

Answers

Answer:

The amount of heat absorbed or released by a substance.

[tex]Q = ml _{v} \\ or \\Q = ml _{f}[/tex]

Answer:

The amount of heat released or absorbed by a substance.

Explanation:

Both sound waves and light waves undergo the phenomenon of refraction when they travel form air to water. How is refraction of sound waves different from the refraction of light waves?​

Answers

Answer:

Glass is denser than air, so a light ray passing from air into glass slows down. If the ray meets the boundary at an angle to the normal , it bends towards the normal. The reverse is also true. A light ray speeds up as it passes from glass into air, and bends away from the normal by the same angle.

Explanation:

Plz help me

A negative charge of-3.0Cand a lositive charge of 3.0 Care separated by 1m, What is the force between the two
charges?

A negative charge of -0,5 Cexerts a repelling force of 10.0 N on a second charge that is 0.5m away. What is the sign
and magnitude of the second charge?
R21

Answers

Answer:

sign of the other charge is -ve

Direction is the length of a route between two points

Answers

The SI unit for distance is the meter (m). Direction is just as important as distance in describing motion. A vector is a quantity that has both size and direction

Hope this helps have a great day!!

6th grade science !!!!!!!!!!!!!!​

Answers

Answer: B
Explanation: I hope this helps you
The answer is B (two)

Question 4 of 20 :
Select the best answer for the question.
4. What do wire junctions on a schematic without a dot mean?
A. It's main circuit wiring.
B. The wires don't touch.
C. The wires are connected.
D. The schematic isn't finished.
Mark for review (Will be highlighted on the review page)
Moyt Ouestion >>

Answers

Answer:

b

Explanation:

A billiard ball collides with a second identical ball in an elastic head-on collision. What is the kinetic energy of the system after the collision compared with the kinetic energy before the collision

Answers

Answer:

Explanation:

From the question, we were made to understand that the collision between the two billiard balls was an elastic collision. Hence, an elastic collision is one in which the kinetic energy is conserved. Meaning the kinetic energy before the collision is still retained after the collision.

Kinetic energy before collision = kinetic energy after collision

1/2mv^2 = 1/2mv^2

There was no gain nor loss in energy

Answer:

unchanged

Explanation:

Because of the dangers associated with the open neutral (grounded conductor), NEC 300.13(B) does not permit the continuity of the ____ conductor to depend on a receptacle.

Answers

Answer:

Grounded ( neutral)

Explanation:

In electrical works there are usually safety measures which needs to be specially adhered to.

We have to take into perspective the dangers associated with the open neutral (grounded conductor) which is the main treason why NEC 300.13(B) does not permit the continuity of the grounded(neutral) conductor to depend on a receptacle.

Select the correct answer. A cruise ship makes its way from one island to another. The ship is in motion compared with which reference point? OA the passengers on the ship ОВ. . the captain of the ship Ос. . a lighthouse on a nearby island OD. the cargo inside the hull of the ship​

Answers

Answer:

C: A lighthouse on a nearby island

Explanation:

Since the ship is in the water, therefore it is in motion compared the reference point "a lighthouse on a nearby island". This is because this reference point is stable and doesn't move and can also be seen from long distance.

Which of the best describes a solution

Answers

Answer:

1).A mixture having a uniform composition where the components can't be seen separately and all components are in the same state best describes a solution. In chemistry, a solution is a homogeneous mixture composed of two or more substances.

Please help me!!!.......​

Answers

Answer: its a

Explanation:

Radioactive iodine (radioiodine) is given to patients with some forms of thyroid cancer in order to destroy the cancer cells. 1311 has a half-life of 8
days. Women who have been treated with 1311 are advised to not become pregnant for 180 days (approximately 6 months) to avoid the
radioactive contamination of a developing fetus.
If a woman has been given a dose of 10 mCi (millicurie, a measurement of radiation), how much 1311 will still be in her system when she can
safely become pregnant?
O 22.5 x 10-6 mc
O 3.125% of the original isotope
O 1.7 x 10-6 ma
O There will be no iodine-131 left in her system after 180 days.

Answers

Answer:

I think is D

Explanation:

Please mark me as brainliest

Randy used to have poor health. Recently, he has lost a lot of weight and has started feeling much better, but he doesn't know which of his life changes contributed to the improvement. Which change most likely helped Randy get better health?

Answers

Answer:

Losing weight?

Explanation:

That would make sense because thats the only thing mentioned

Answer:

He started getting a full night of restful sleep.

Explanation:

hope 04.01 quizlet

A crane lifts a 1000 newton pallet 30 meters. How much work does the

crane do on the pallet? Include units in your answer but no decimal point

or digits to the right of the decimal point. *

Answers

Answer:

Workdone = 3000Nm

Explanation:

Given the following data;

Force, F = 1000 N

Distance, d = 30 m

We know that workdone is given by the formula;

Workdone = force * distance

Substituting into the equation, we have;

Workdone = 1000 * 30

Workdone = 3000Nm

A skydiver has a mass of 65 kg.
Calculate the weight of the skydiver.

Answers

F=m*a
F=65 kg *9.8 m/s^2
F=637 N (Newtons) — this is the weight

Explain how the Law of Conservation of Energy applies to the energy

transformations that occur from the outlet charger to the ringing phone.

Answers

Answer:

The mobile electric energy gets converted into chemical energy while charging.

Explanation:

According to the law of conservation of energy, no energy is destroyed when one form of energy is transformed to another in the process as energy cannot be created or destroyed. As a result, total amount of energy remains same before and after any kind of transformation.

Generally, lithium ion batteries are used in mobile phones. In such batteries, the electricity is stored in the ionic structure by the chemical changes.

The mobile electric energy gets converted into chemical energy while charging.

Which Energy is missing in the windmill energy transformation?
Wind> _________> Electrical

1.Solar
2.Light
3.Mechanical
4.Sound

Answers

Answer:

3.mechanical is the answer

Mechanical energy is missing in the windmill energy transformation.

Wind> Mechanical> Electrical. Hence option (3) is correct.

What is Wind energy?

The process of using the wind to produce mechanical or electrical energy is known as wind power or wind energy. The kinetic energy of the wind is transformed into mechanical power by wind turbines. This mechanical energy can be used to particular activities (such pumping water or grinding grain) or can be transformed into electricity by a generator.

When the project size is created to match the energy requirements of the load while simultaneously monetizing economies of scale and equipment track record, wind turbine economics are maximized. A modest turbine (usually less than 10 kW) that can produce the amount of electricity needed by a residence for daily operation is needed for residential onsite energy consumption.

Learn more about wind power here:

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What are the paper sleeves that were invented in 1991 called for coffee cups

Answers

Answer:

Sorensen invented the insulated sleeve to fit around a standard paper coffee cup saving millions of coffee drinkers from burns. The sleeve was called the Java Jacket for which he obtained patent protection. Java Jacket, Inc. was incorporated in 1993 by Inventor Sorensen with an investment of just $20,000.Oct 8, 2013

Explanation:

Hope this helps and have a great day!!!

Answer:

Housed in the same building as Vincent van Gogh’s “The Starry Night” and Andy Warhol’s “Campbell’s Soup Cans” is a simple paper coffee cup sleeve. It can be found not in the café at New York’s Museum of Modern Art (MoMA), but rather in the museum’s collections alongside renowned works of art worth millions. But it would be wrong to consider it out of place; the genius of the coffee cup sleeves makes it a million-dollar object as well.

For many, the morning ritual wouldn’t be complete without standing in line at a nearby coffee shop, placing an order with a frazzled cashier managing the A.M. rush and watching the barista pour the coffee, slap a slid on top of the cup and slip a cardboard sleeve over it. It’s a simple and logical ritual, but without that sleeve, what would have happened to our to-go coffee culture? In 2005, MoMA paid tribute to this ingenious design defining the modern American coffee tradition when it acquired a standard coffee cup sleeve for the exhibit “SAFE: Design Takes on Risk,” which featured products that were created to protect. The sleeve takes pride of place at MoMA, alongside Post-It notes, Bic pens and Band-Aids in a collection called “Humble Masterpieces.”

Explanation:

I hope it help

If a ball is thrown alt 96 m/s, and it travels 3 seconds, what is the total distance the ball travelec

Answers

Answer: 288 m

Explanation: 288 m is the correct answer because the question states that the ball is thrown at 96 m every second, and our question tells us that the ball travels 3 seconds. This means we have to multiply 96 x 3 = 288 m.

Answer:

288

Explanation:

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list all first 5 multiple of the following numbers List these by number 1-10 from least to greatest Plssssssss Help!!!!Using the map of Alexanders conquest, approximately how many miles did Alexander and his army cover on their route? How were Native Americans affected by national expansion?O A. They migrated to big cities in the East.O B. They became rich by selling land to settlers.C. The helped settlers establish farms.O D. They were forced to move to reservations. Under NATO, the United States, Canada, and Western European nations agreed to negotiate a peace treaty with the Soviet Union. reduce their military forces by equivalent amounts. ask the United Nations for permission to go to war. defend each other against attacks by responding with force. show a graph that represents the equation of y=2x+1 In the accompanying diagram of ABC ca is extended to D, mABC = 70 and mBCA =50 Find mDAB Which word is used incorrectly in the sentence below?My father assured me the tree was the perfect size to bare the weight of my tree house.A. SizeB. ToC. BareD. Weight The largest planet in the solar system is Jupiter,with a diameter of 71,398 km. What is the diameter of Jupiter in centimeters? Define acceleration due to gravity PLZZZZZ help me I need the right answer ASAP and can't be copy and pasted*CORRECT ANSWER GETS BRAINLIEST how many quadrants are in a coordinate plane. A coordinsed plane has quadrants how can out cyber identity be used to commit crimes? What types of natural events are common on the west coast check all that applyEarthquakes, blizzards, volcanoes, hurricanes What is the slope of the line? Which is NOT true of cancer cells? What function does an extranet perform? PLEASE HELP WILL MARK BRAINLIEST! What is the play A midsummer nights dream by William Shakespeare about Help with 3 and 4 for brainlist I promise thx A construction zone on Interstate 15 has a speed limit of 40 mph. The speeds of vehicles passing through this construction zone are normally distributed with a mean of 44 mph and a standard deviation of 3 mph.Required:a. Find the percentage of vehicles who pass through this construction zone who are exceeding the posted speed limit. b. What percentage of vehicles travel through this construction zone with speeds between 50 mph and 55 mph?