Physics, 18.02.2020 21:55 Ashlynnocean6305

Two blocks, A and B, are connected by a rope. A second rope is connected to block B and a steady, horizontal tension force of T is applied. The system moves at a constant speed across the ground. Block B experiences a friction force of f. T = 50N f = 10N
What is friction force acting on block A?

Answers: 1

Show answers

Answers

Answer from: Asterisk

40 N

Explanation:

We are given that

Speed of system is constant

Therefore, acceleration=a=0

Tension applied on block B=T=50 N

Friction force=f=10 N

We have to find the friction force acting on block A.

Let T' be the tension in string connecting block A and block B and friction force on block A be f'.

For Block B

T-f-T'=m_Ba

Where m_B =Mass of block B

Substitute the values

$50-10-T'=m_B\times 0=0$

T'==40 N

For block A

T'-f'=m_Aa

Where m_A= Mass of block A

Substitute the values

$40-f'=m_A\times 0=0$

f'=40 N

Hence, the friction force acting on block A=40 N

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

explanation:

Another question on Physics

Physics, 22.06.2019 04:30

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons

Answers: 2

Answer

Physics, 22.06.2019 11:50

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Answers: 2

Answer

Physics, 22.06.2019 16:00

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Answers: 1

Answer

Physics, 22.06.2019 18:30

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?

Answers: 3

Answer

You know the right answer?

Two blocks, A and B, are connected by a rope. A second rope is connected to block B and a steady, ho...

Questions