Physics Middle School

The Force of friction between an object and the surface upon which it is sliding is 12N. The weight of the object is 20N. What is the coefficient of kinetic friction?

Use equation Ffr=Uk(mg)

Answers

Answer 1

Answer: The coefficient of kinetic friction is μ = 0.6

Explanation:

For an object of mass M, the weight is:

W = M*g

where g is the gravitational acceleration: g = 9.8m/s^2

And the friction force between this object and the surface can be written as:

F = W*μ

where μ is the coefficient of friction (kinetic if the object is moving, and static if the object is not moving, usually the static coefficient is larger)

In this case, the weight is:

W = 20N

And the friction force is:

F = 12N

Replacing these values in the equation for the friction force we get:

12N = 20N*μ

(12N/20N) = μ = 0.6

The coefficient of kinetic friction is μ = 0.6

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I know it’s a lot so I’m giving 25 points....PLEASE HELP WITH EVERYTHING

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Answer:

eeeeeeeeeeeeeeeeeeee

Include a picture so I could understand

Which form of energy is associated with the motion of an object?


chemical

kinetic

potential

thermal

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Answer: kinetic energy

Explanation:

kinetic energy lolol

need help best answer will get brainiest

Answers

Answer:

1) A trait is a specific feature or characteristic, typically genetic.

2) One trait that helps an animal survive is a Chameleon's camouflage. Camouflage helps the chameleon blend in with their surroundings to avoid a predator or to sneak up on prey.

Explanation:

1) a trait is a specific feature or characteristic, typically genetic.

2) One trait that helps an animal survive is a chameleon’s camouflage. Camouflage helps a chameleon blend in with their surroundings to avoid a predator or to sneak up on prey.

PLEASE HELP ITS URGENT

Look at the images and answer the first image has the question and two answer choices the second has the other two answer choices. Thank you!

(the order actually got messed up so the second is the question sorry)

Answers

I think B because it’s the only one where everything is father now then in 10,000 bc
It has been a member since it has to do with this post, I do think it would have been a great job in the world and 3+5

Why do mountain streams flow fast and wild?


A. they are usually steeper


B. they are corralled by rock


C. both b and c


D. they flow through dirt

Answers

Answer:

Both b and C

Explanation:

The answer is A because they are usually steeper

Which is a substance that takes the shape and volume of its container?


gas

crystalline solid

amorphous solid

liquid

Answers

Answer:

liquid

Explanation:

Gases particles are located far apart from each other and they have no definite volume and shape. Gaseous substances takes the shape and volume of the container.

What are gases ?

There are three common states of matter namely, gas , liquid and solids. The particle composition in each state is different. In solids, the atoms or particles are tightly packed without a space to move them apart.

This strong intermolecular force in solids make them in perfect shape and size. They have definite volume also. In liquids, particles have some space to move apart and they can flow, so does no shape but have definite volume.

In the case of gaseous substances, the particles have least intermolecular forces and they are far apart and free to spread in the atmosphere. Hence, they don't have a definite shape and volume and they assume the shape and volume of the container.

Find more on gases:

https://brainly.com/question/29665974

#SPJ6

At which location would you expect the LOWEST TEMPERATURE?

Answers

it’s B, the higher up you are the lower the temp

The mass of an electron is about 9.11 × 10-31 kg. Write this as a whole number

Answers

Answer:

1 electron has a mass of 9.1 X 10-31 kg. How many electrons n does it take to make 1 kg?

(1 e)/(9.1 X 10-31 kg) = n/(1 kg)

So, n = 1.10 X 1030 electrons

Each electron has a charge of 1.6 X 10-19 C, where C stands for Coulombs. So, the n electrons have a charge of q = ne = (1.10 X 1030 electrons) X (1.6 X 10-19 C/electron) = 1.76 X 1011 C. This is an insane charge!

The electrostatic force between two of these 1kg bundles of electrons is given by Coulomb's law:

F = k qq/r2 = (8.99 X 109)(1.76 X 1011 C)2/(1000 m)2 = 2.78 X 1026 N.

No idea this is to complicating peace
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