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
Virty [35]
3 years ago
5

You are working in a shoe test laboratory measuring the coefficients of friction for running shoes on a variety of surfaces. The

shoes are pushed against the surface with a downward force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The machine pulls with a force of 300 N before the material begins to slide. When the material is sliding, the machine only has to pull with a force of 200 N to keep the material moving. What is the coefficient of static friction between the shoe and the material
Physics
1 answer:
AnnZ [28]3 years ago
6 0

Answer:

0.75

Explanation:

Since the static frictional force is the maximum force applied just before sliding, our frictional force, F is 300 N.

Since F = μN where μ = coefficient of static friction and N = normal force = 400 N (which is the downward force applied against the surface).

So, μ = F/N

= 300 N/400 N

= 3/4

= 0.75

So, the  coefficient of static friction μ = 0.75

You might be interested in
Science If you want to find the energy quantum of light, you multiply the frequency of the radiation (v) by "h". What is "h"?
weqwewe [10]

Answer:

"h" signifies Planck's constant

Explanation:

In the equation energy E = h X v

The "h" there signifies Planck's constant

Planck's constant is a value, that shows the rate at which the energy of a photon increases/decreases, as the frequency of its electromagnetic wave changes.

It was named after Max Planck who discovered this unique relationship between the energy of a light wave and its frequency.

Planck's constant, "h" is usually expressed in Joules second

Planck's constant = 6.62607015 \times 10^{-34}  J.s

7 0
2 years ago
Both speed and velocity measure how fast something is moving. However, since speed is not a _______ it does not require a(n )___
Arturiano [62]

Speed is different from velocity. Velocity is a vector quantity and has a direction. Speed is a scalar quantity and does not require a direction. The answer must be D).

5 0
3 years ago
Read 2 more answers
1. An EM wave representing 650 nm laser light is traveling in the +zˆ direction. At one point in space and time, the electric fi
ivann1987 [24]

Answer:

Explanation:

a ) Direction of the magnetic field will be in positive x direction.

The direction of the vector E X B gives the direction of motion of wave.

b ) Magnitude of magnetic field is given by the relation

E₀ / B₀ = c , c is velocity of light

B₀ = E₀ / c

= 20 / (3 x 10⁸)

= 6.67 x 10⁻⁸ T

c ) Average power flowing per unit area by this wave is called Poynting vector

c ε₀E₀² , ε₀ = 8.85X10⁻¹²

= 3 X 10⁸ X 8.85 X 10⁻¹² X 20²

= 1.062 W m⁻²

5 0
3 years ago
in coal-fired power plants, coal is burned to produce ____________________, which is then used to turn a turbine.
crimeas [40]
The answer is STEAM.
6 0
3 years ago
Read 2 more answers
How long does it take a cup of fresh water to freeze, boil and evaporate compared to fresh water
eduard
They exhibit identical behaviors with regard to changes of phase.
If there is any difference, it is too small to be measured, and none
has been observed.
7 0
3 years ago
Other questions:
  • What is Density? (3-5 sentences or your own word don't copy the<br> notes)
    10·1 answer
  • A rope is vibrated so that transverse waves propagate down it. if the distance between crests is 0.5 m and a new crest reaches t
    5·1 answer
  • Facts or naw:<br> common sense is so rare that it should be a superpower
    14·2 answers
  • Who yall think gonna win Seahawks or Vikings? Seahawks all the way
    14·2 answers
  • Which of the following best represents potential energy being converted to kinetic energy? A. A man jogs and stops to drink an e
    7·2 answers
  • In vacuum, red light travels at a greater speed than blue light does. <br> a. true <br> b. false?
    15·1 answer
  • The matter that makes up a planet is distributed uniformly so that the planet has a fixed, uniform density. How does the magnitu
    5·1 answer
  • I need help plz and thank you❤
    11·1 answer
  • Use dominant trait in a sentence
    14·1 answer
  • Convert 1 million inches into miles.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!