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
earnstyle [38]
2 years ago
5

A car travels around a level, circular track that is 750m across. What coefficient of friction is required to ensure the car can

stay on the track at 85mph
Physics
1 answer:
Crank2 years ago
8 0

The coefficient of friction must be 0.196

Explanation:

For a car moving on a circular track, the frictional force provides the centripetal force needed to keep the car in circular motion. Therefore, we can write:

\mu mg = m\frac{v^2}{r}

where the term on the left is the frictional force acting between the tires of the car and the road, while the term on the right is the centripetal force. The various terms are:

\mu is the coefficient of friction between the tires and the road

m is the mass of the car

g=9.8 m/s^2 is the acceleration of gravity

v is the speed of the car

r is the radius of the curve

In this problem,

r = 750 m is the radius

v=85 mph \cdot \frac{1609}{3600}=38.0 m/s is the speed

And solving for \mu, we find the coefficient of friction required to keep the car in circular motion:

\mu = \frac{v^2}{rg}=\frac{38.0^2}{(750)(9.8)}=0.196

Learn more about circular motion:

brainly.com/question/2562955  

brainly.com/question/6372960  

#LearnwithBrainly

You might be interested in
What is nuclear energy
irina1246 [14]
Nuclear energy <em>is t</em><span><em>he energy released during nuclear fission or fusion.

</em>
</span>
6 0
3 years ago
Read 2 more answers
Jason applies a force of 4.00 newtons to a sled at an angle 62.0 degrees from the ground. What is the component of force effecti
Andreas93 [3]
Answer: 1.88 N

Explanation:

Data:

Force = 4.00N
angle = 62°
horizontal force = ?

Solution:

The trigonometric ratio that relates horizontal - leg to hypotenuse is the cosine.

That ratio is:

                        horizontal - leg
cos(angle) = -------------------------
                          hypotenuse

So, applied to the force, that is:

                             horizontal force
cos (angle) = -----------------------------------
                                 total force

So, clearing the horizontal component you get:
                                         
horizontal force = force * cos (angle)

Substitute the data given:

horizontal force = 4.00N * cos(62°) = 4.00N * 0.4695 = 1.88 N

Answer: 1.88N


7 0
2 years ago
Read 2 more answers
James observes that the Polaris star in the northern hemisphere does not rise and set in the sky. His teacher tells him that thi
Nimfa-mama [501]

Answer:

Just above the pole (top-most red circle)

Explanation:

Polaris is used to identify North direction. Since, the Earth rotates on its axis which is along North-south, Polaris never seems to rise and set from the Northern hemisphere. This is because Polaris lies above north pole. Thus, in the given diagram, Polaris is above the North pole on the axis represented by top-most red circle.

7 0
3 years ago
Read 2 more answers
Jason is taking a physical exam and has to do push ups for sixty seconds. He does 30 pushups in the sixty seconds. Each push up
Alexandra [31]

Answer: 2 seconds is the unit rate.

Explanation:

We know that Jason does 30 pushups in 60 seconds at a constant rate, and we know that each push up takes 2 seconds.

then, we can write this as 30 pushups/60 seconds = (1/2) pushups per second.

Here, two seconds represents the time needed to do one pushup, is the unit rate (this means that we need 2 seconds to have a unit "one pushup")

8 0
3 years ago
A light bulb, a fan, and a tiny speaker are connected to a battery in a series circuit. How will the circuit behave if it is ope
kakasveta [241]
If the circuit is open, then there will be no light or sound. No current will flow and no air will move.
3 0
2 years ago
Read 2 more answers
Other questions:
  • I need help with the circled one
    5·1 answer
  • A plate having an area of 0.6 m2 is sliding down the inclined plane at 300 to the horizontal with a velocity of 0.36 m/s. There
    9·1 answer
  • Chose the word that correctly completes the following sentence: Kirchoff's junction law expresses the conservation of ____. a) m
    15·1 answer
  • 1. The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?
    12·2 answers
  • If a stone with an original velocity of zero is falling from a ledge and takes eight seconds that it the ground what is the fina
    8·1 answer
  • According to the information in the table, who is the fastest typist? ella
    5·2 answers
  • Which of the following is not an example of work?
    8·1 answer
  • if the instantaneous current in the circuit is giveen by I=3 sin theta amperes, the rms value of the current will be
    5·1 answer
  • Plz help this is so confusing
    9·1 answer
  • This lab is investigating the relationship between mass, ________, and momentum.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!