1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stiv31 [10]
3 years ago
15

an object of mass 4 kg is placed on an inclined plane at an angle of 60. if the object slides down the plane with an acceleratio

n of 3m/s, what is the coefficient of the kinetic friction
Physics
1 answer:
balandron [24]3 years ago
6 0

The forces on the  y axis are:

N-mgcos(60)=0   , wich becomes

N=mgcos(60)

Rember that the friction force is always contrary to the motion of an object and its formula is  f=μ * N

The forces in the x axis are:

-f + mgsin(60)= m * a

-μ*mgcos(60) + mgsin(60)=m*a  ,

μ = ( m*a - mgf=μ[sin(60) )/ ( mgcos(90) )


You might be interested in
An airplane has wings, each with area A, designed so that air flows over the top of the wing at 265 m/s and underneath the wing
exis [7]

Answer

given,

Pressure on the top wing = 265 m/s

speed of underneath wings = 234 m/s

mass of the airplane =  7.2 × 10³ kg

density of air =  1.29 kg/m³

using Bernoulli's equation

 P_1 + \dfrac{1}{2}\rho v_1^2 = P_2 + \dfrac{1}{2}\rho v_2^2

 \Delta P =\dfrac{1}{2}\rho (v_2^2-v_1^2)

 \Delta P =\dfrac{1}{2}\times 1.29\times (265^2-234^2)

 \Delta P =9977.5 Pa

Applying newtons second law

2 Δ P x A - mg = 0

A =\dfrac{mg}{2\Delta P}

A =\dfrac{7.2\times 10^3 \times 9.8}{2\times 9977.5}

    A = 3.53 m²

7 0
3 years ago
To understand the first law of thermodynamics and its origin. By relating heat, thermal energy, and work, the first law lays the
sergejj [24]

Answer:

okay

Explanation:

6 0
3 years ago
Which of the following is a possible use for nuclear energy?
belka [17]
<span>Nuclear energy can be used to power all of the above choices. Nuclear power plants produce radioactive waste that must be stored properly. It is very impossible for a nuclear power plant to have no waste at all since lots of chemicals are used to create the process as it gives energy to other machines, weapons such as bombs and  powering submarines.  Radioactive waste can not be released into local water supplies since the wastes are very radioactive and may cause mutation to the fishes and bioaccumulation which will affect humans as well. It will also cause air pollution if the chemicals are not stored properly.</span>
5 0
4 years ago
Read 2 more answers
A stretched string is observed to have four equal segments in a standing wave driven at a frequency of 480 hz. what driving freq
Korvikt [17]

600Hz is the driving frequency needed to create a standing wave with five equal segments.

To find the answer, we have to know about the fundamental frequency.

<h3>How to find the driving frequency?</h3>
  • The following expression can be used to relate the fundamental frequency to the driving frequency;

                                        f(n) = n * f (1)

where, f(1) denotes the fundamental frequency and the driving frequency f(n).

  • The standing wave has four equal segments, hence with n=4 and f(n)=4, we may calculate the fundamental frequency.

                                          f(4) = 4× f (1)

                                          480 = 4× f(1)

                                         f(1) = 480/4 =120Hz.

So, 120Hz is the fundamental frequency.

  • To determine the driving frequency necessary to create a standing wave with five equally spaced peaks?
  • For, n = 5,

                      f(n) = n 120Hz,

                      f(5) = 5×120Hz=600Hz.

Consequently, 600Hz is the driving frequency needed to create a standing wave with five equal segments.

Learn more about the fundamental frequency here:

brainly.com/question/2288944

#SPJ4

8 0
1 year ago
An object is accelerating at a constant rate due to a force being applied.what can be done to the force to decrease the objects
Sliva [168]

Answer:

y

Explanation:

W's your is kamiko ballsy go now cameco cicomaco C local cinema as he called summer cause she Laura she scola Kolyma see kamala cause he go see more across the ground come on I can I circular aggregate als the Irish Irish Irish

6 0
3 years ago
Other questions:
  • If I push on a wall with a force of 3500 N for 5 hours but the wall does not move, how much work have I done.
    9·1 answer
  • Which aspect of relativity makes faster-than-light travel theoretically possible?
    5·1 answer
  • I WILL GIVE BRAINLIEST TO THE BEST ANSWER
    14·2 answers
  • Two people must have the same speed and velocity if they are walking towards each other, they are walking away from each other,
    15·1 answer
  • how do you relate the equations for kinetic and potential energy to illustrate the law of conservation of energy?
    9·1 answer
  • If the wavelength is tripled, while the speed of the wave is held constant, what happens to the frequency?
    11·1 answer
  • During __________, frequently used synaptic connections in the brain strengthen while rarely used connections tend to thin.
    12·2 answers
  • Hydrogen peroxide is sold commercially as an aqueous solution in brown bottles to protect it from light. Calculate the longest w
    6·2 answers
  • If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water wouldA sink.B
    9·1 answer
  • According to Newton's First Law of Motion _____.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!