Physics, 27.07.2019 11:00 amiahmiller79

Adog (mass 12.3 kg) sits on a sled (mass 5.1 kg) that is being pushed with a force of 33 n on a flat snowy surface. if the acceleration of both is 1.5 m/s2, what is the coefficient of kinetic friction for the sled sliding on the snow?

Answers: 1

Show answers

Answers

First, you need to calculate the resultant force:
R = m · a
   = (12.3 + 5.1) · 1.5
   = 26.1 N

Then, you can calculate the force of friction:
R = F - Fₐ
Fₐ = F - R
= 33 - 26.1
= 6.9 N

Now, we know that:
Fₐ = μ·m·g
Therefore we can solve for μ:

μ = Fₐ/mg
   = 6.9 / (17.4 · 9.8)
   = 0.40

The coefficient of dynamic friction is μ = 0.40

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Answer from: Quest

the bal will not change its velocity.

Other questions on the subject: Physics

Physics, 22.06.2019 02:00, gavergan

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Answers: 2

continue

Physics, 22.06.2019 02:00, robert7248

An object has a weight of 500 on earth what is the mass of this object

Answers: 1

continue

Physics, 22.06.2019 05:30, jalexus

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

Answers: 2

continue

Physics, 22.06.2019 14:30, makylahoyle

You can decrease the resistance of a length of wire by

Answers: 2

continue

You know the right answer?

Adog (mass 12.3 kg) sits on a sled (mass 5.1 kg) that is being pushed with a force of 33 n on a flat...