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
katovenus [111]
3 years ago
10

A crate of 45.2-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that th

e crate just begins to move when your force exceeds 321 N . After that you must reduce your push to 205 N to keep it moving at a steady 22.3 cm/s . Part A What is the coefficient of static friction between the crate and the floor? μsμ s = nothing Request Answer Part B
Physics
1 answer:
iragen [17]3 years ago
8 0

Answer:

 μ = 0.725

Explanation:

This problem refers to Newton's second law.

       F = ma

Let's write the equations on each axis

Y Axis

      N-W = 0

     N = W

    N = mg

X axis

   F-fr = ma

With the body not started moving its acceleration is zero

  F-fr = 0

  F = fr

The friction force equation is

  fr = μ N

  fr = μ m g

Let's replace and calculate

   F = μ m g

   μ = F / mg

   μ = 321 /45.2 9.8

   μ = 0.725

You might be interested in
When do you turn your wheels sharply left before backing slowly in a parallel parking maneuver?
Alex_Xolod [135]

Answer:

What is C - when your front bumper is even with the front vehicles back bumper.

Explanation:

Good Luck

8 0
2 years ago
What is the specific heat of a material that has a mass of 5 grams and increases 125ºC when it receives 150J of heat?
rjkz [21]

Answer:

0.24 ? I hope that was the answer you were looking for.

Explanation:

6 0
3 years ago
Read 2 more answers
it is possible to tell if objects in space are moving closer to us or farther away based on which of the following?
valkas [14]
I think you forgot to give the options along with the question. I am answering the question based on my knowledge and research. It is <span>possible to tell if objects in space are moving closer to us or farther away based on several procedures like parallax and standard candles. I hope the answer has come to your help.</span>
7 0
3 years ago
Read 2 more answers
Which ionic compound is used as a building material?
Maurinko [17]
Magnesium oxide is an ionic compound that can be used as a building material. MO2 is actually a raw material that used in producing cement for building houses, buildings, and other constructions.
Many old structures were made of limestones. Limestone is from Calcium Carbonate (CaCO3) which is an ionic compound and can be used as a building material too.
8 0
3 years ago
Read 2 more answers
A circular cross section, d = 25 mm, experiences a torque load, T = 25 N·m, and a shear force, V = 85 kN. Calculate the shear st
Maru [420]

Answer:

The correct answer is 231 Mpa i.e option a.

Explanation:

using the equation of torsion we Have

\frac{T}{I_{p}}=\frac{\tau }{r}\\\\\therefore \tau =\frac{T}{I_{p}}\times r

where,

\tau= shear stress at a distance 'r' from the center

T = is the applied torque

I_{p} = polar moment of inertia of the section

r = radial distance from the center

Thus we can see that if a point is located at center i.e r = 0 there will be no shearing stresses at the center due to torque.

We know that in case of a circular section the maximum shearing stresses due to a shear force occurs at the center and equals

\tau _{max}=\frac{4}{3}\times \frac{V}{A}

Applying values we get

\tau _{max}=\frac{4}{3}\times \frac{85\times 10^{3}}{0.25\times \pi \times (25\times 10^{-3})^{2}}\\\\\therefore \tau _{max}=230.88Mpa\approx 231Mpa

3 0
3 years ago
Other questions:
  • A circuit component with a high resistance will have a low electric current.
    7·1 answer
  • Which type of cloud would you expect to be involved in some form of precipitation?
    6·1 answer
  • How does altitude, distance from the ocean, amount of sunlight, distance from the equator, and ocean currents affect polar clima
    12·1 answer
  • A source emits sound with a frequency of 860 Hz. It is moving at 20.0 m/s toward a stationary reflecting wall. If the speed of s
    15·2 answers
  • A rocket passes you at a speed of 0.85c, and you measure its length to be 35.0 m. What is its measured length when at rest?
    13·1 answer
  • Which section (A or B) of the roller coaster shows positive acceleration?
    14·2 answers
  • A 3.00 kg object is moving in the XY plane, with its x and y coordinates given by x = 5t³ !1 and y = 3t ² + 2, where x and y are
    11·1 answer
  • An illustration of a ball sitting at the top of a hill of height labeled h Subscript 1 Baseline = 2 m. A the the bottom of the h
    8·2 answers
  • A vertical spring with a spring constant of 420 N/m is mounted on the floor. From directly above the spring, which is unstrained
    6·1 answer
  • Object A represents fixed negatively charged particle and Object B represents fixed. positively-charged particle. Object ( shows
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!